List of asteroid close approaches to Earth in 2021

Last updated

Time of discovery of asteroids which passed within 1 lunar distance from Earth in 2021
Circle frame.svgAfter closest approach: 70 (45.5%)< 24 hours before: 33 (21.4%)up to 7 days before: 50 (32.5%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 1 (0.6%)
  •   After closest approach: 70 (45.5%)
  •   < 24 hours before: 33 (21.4%)
  •   up to 7 days before: 50 (32.5%)
  •   > one week before: 0 (0.0%)
  •   > 7 weeks before: 0 (0.0%)
  •   > one year before: 1 (0.6%)
Other Years
2019, 2020, 2021, 2022, 2023
Counts of confirmed asteroids which were discovered on their 2021 close approach, by discoverer
Circle frame.svgG96 Mt. Lemmon Survey: 53 (37.3%)F51 Pan-STARRS 1, Haleakala: 17 (12.0%)T05 ATLAS-HKO, Haleakala: 13 (9.2%)703 Catalina Sky Survey: 12 (8.5%)T08 ATLAS-MLO, Mauna Loa: 11 (7.7%)I41 ZTF, Palomar Mountain: 10 (7.0%)381 Tokyo-Kiso: 9 (6.3%)K88 GINOP-KHK, Piszkesteto: 6 (4.2%)W94 MAP, San Pedro de Atacama: 5 (3.5%)F52 Pan-STARRS 2, Haleakala: 4 (2.8%)V00 Kitt Peak-Bok: 2 (1.4%)
  •   G96 Mt. Lemmon Survey: 53 (37.3%)
  •   F51 Pan-STARRS 1, Haleakala: 17 (12.0%)
  •   T05 ATLAS-HKO, Haleakala: 13 (9.2%)
  •   703 Catalina Sky Survey: 12 (8.5%)
  •   T08 ATLAS-MLO, Mauna Loa: 11 (7.7%)
  •   I41 ZTF, Palomar Mountain: 10 (7.0%)
  •   381 Tokyo-Kiso: 9 (6.3%)
  •   K88 GINOP-KHK, Piszkesteto: 6 (4.2%)
  •   W94 MAP, San Pedro de Atacama: 5 (3.5%)
  •   F52 Pan-STARRS 2, Haleakala: 4 (2.8%)
  •   V00 Kitt Peak-Bok: 2 (1.4%)
Prediction accuracy for asteroids of magnitude 27 or larger nominally predicted to pass within 1 lunar distance of Earth in 2021 [note 1]
Circle frame.svgUnpredicted: 11 (91.7%)Predicted but not observed: 1 (8.3%)Observed but details incorrect: 0 (0.0%)Distance correct but not date: 0 (0.0%)Date correct but not distance: 0 (0.0%)Successfully predicted: 0 (0.0%)
  •   Unpredicted: 11 (91.7%)
  •   Predicted but not observed: 1 (8.3%)
  •   Observed but details incorrect: 0 (0.0%)
  •   Distance correct but not date: 0 (0.0%)
  •   Date correct but not distance: 0 (0.0%)
  •   Successfully predicted: 0 (0.0%)

Below is the list of asteroids that have come close to Earth in 2021.

Contents

Timeline of known close approaches less than one lunar distance from Earth

A list of known near-Earth asteroid close approaches less than 1 lunar distance (0.0025696 AU (384,410 km; 238,860 mi)) from Earth in 2021. [1]

For reference, the radius of Earth is about 0.0000426 AU (6,370 km; 3,960 mi) or 0.0166 lunar distances. Geosynchronous satellites have an orbit with semi-major axis length of 0.000282 AU (42,200 km; 26,200 mi) or 0.110 lunar distances.

The largest asteroid to pass within 1 LD of Earth in 2021 was 2021 SG with an estimated diameter of around 68 meters and an absolute magnitude of 24.0. The fastest asteroid to pass within 1 LD of Earth in 2021 was 2021 UA7 that passed Earth with a velocity with respect to Earth of 27.7 km/s (62,000 mph). [2] [note 2]

  Rows highlighted red indicate objects which were not discovered until after closest approach

  Rows highlighted yellow indicate objects discovered less than 24 hours before closest approach

  Rows highlighted green indicate objects discovered more than one week before closest approach

  Rows highlighted turquoise indicate objects discovered more than 7 weeks before closest approach

  Rows highlighted blue indicate objects discovered more than one year before closest approach (i.e.
objects successfully cataloged on a previous orbit, rather than being detected during final approach)

Date of
closest
approach		Discovery [note 3] Object Nominal geocentric distance [note 4] Approx.
size (m)		(H)
(abs. mag)		Closer
approach
to Moon
[note 5]
(AU)(Lunar
distance)
[note 6]
2021-01-01 [3] 2021-01-02
G96 Mt. Lemmon Survey [4] 		2021 AA0.00159 AU (238,000 km; 148,000 mi)0.6211–2427.0—
2021-01-03 [5] 2021-01-03
703 Catalina Sky Survey [6] 		2021 AH0.00033 AU (49,000 km; 31,000 mi)0.135.3–1228.5—
2021-01-04 [7] 2021-01-05
G96 Mt. Lemmon Survey [8] 		2021 AH80.00035 AU (52,000 km; 33,000 mi)0.143.2–7.229.6—
2021-01-09 [9] 2021-01-08
G96 Mt. Lemmon Survey [10] 		2021 AS20.00072 AU (108,000 km; 67,000 mi)0.283.2–7.229.6—
2021-01-16 [11] 2021-01-18
G96 Mt. Lemmon Survey [12] 		2021 BR20.00049 AU (73,000 km; 46,000 mi)0.191.8–4.130.8—
2021-01-18 [13] 2021-01-17
G96 Mt. Lemmon Survey [14] 		2021 BK0.00075 AU (112,000 km; 70,000 mi)0.292.3–5.230.3—
2021-01-18 [15] 2021-01-17
703 Catalina Sky Survey [16] 		2021 BV10.00161 AU (241,000 km; 150,000 mi)0.626.6–1528.0—
2021-01-18 [17] 2021-01-17
G96 Mt. Lemmon Survey [18] 		2021 BO0.00016 AU (24,000 km; 15,000 mi)0.060.68–1.533.0—
2021-01-20 [19] 2021-01-18
G96 Mt. Lemmon Survey [20] 		2021 BO10.00168 AU (251,000 km; 156,000 mi)0.653.8–8.629.2—
2021-01-26 [21] 2018-01-18 [22] 2018 BA30.00250 AU (374,000 km; 232,000 mi)0.9714–3126.4—
2021-02-04 [23] 2021-02-05
703 Catalina Sky Survey [24] 		2021 CV0.00135 AU (202,000 km; 125,000 mi)0.524.4–9.928.9—
2021-02-09 [25] 2021-02-09
I41 Palomar Mountain—ZTF [26] 		2021 CZ30.00015 AU (22,000 km; 14,000 mi)0.061.7–3.831.0—
2021-02-11 [27] 2021-02-05
703 Catalina Sky Survey [28] 		2021 CO0.00242 AU (362,000 km; 225,000 mi)0.9423–5225.3—
2021-02-11 [29] 2021-02-11
703 Catalina Sky Survey [30] 		2021 CQ50.00119 AU (178,000 km; 111,000 mi)0.465.1–1128.6—
2021-02-12 [31] 2021-02-11
V00 Kitt Peak-Bok [32] 		2021 CC60.00113 AU (169,000 km; 105,000 mi)0.442.5–5.530.1—
2021-02-12 [33] 2021-02-12
381 Tokyo-Kiso [34] 		2021 CC70.00217 AU (325,000 km; 202,000 mi)0.843.0–6.729.7—
2021-02-13 [35] 2021-02-10
F51 Pan-STARRS 1, Haleakala [36] 		2021 CA60.00111 AU (166,000 km; 103,000 mi)0.435.2–1228.6—
2021-02-14 [37] 2021-02-12
T08 ATLAS-MLO, Mauna Loa [38] 		2021 CS60.00100 AU (150,000 km; 93,000 mi)0.397.3–1627.8—
2021-02-14 [39] 2021-02-13
K88 GINOP-KHK, Piszkesteto [40] 		2021 CW70.00019 AU (28,000 km; 18,000 mi)0.071.5–3.431.2—
2021-02-18 [41] 2021-02-18
I41 Palomar Mountain—ZTF [42] 		2021 DN10.00226 AU (338,000 km; 210,000 mi)0.886.3–1428.1—
2021-02-18 [43] 2021-02-17
G96 Mt. Lemmon Survey [44] 		2021 DG0.00111 AU (166,000 km; 103,000 mi)0.432.2–4.930.4—
2021-02-21 [45] 2021-02-22
K88 GINOP-KHK, Piszkesteto [46] 		2021 DA20.00132 AU (197,000 km; 123,000 mi)0.513.9–8.729.2—
2021-03-012021-03-02ZTF0KfF0.00187 AU (280,000 km; 174,000 mi)0.73 [note 7] 0.96–5.931.0 ? [47]
2021-03-02 [48] 2021-03-01
K88 GINOP-KHK, Piszkesteto [49] 		2021 EA0.00063 AU (94,000 km; 59,000 mi)0.246.3–1428.1—
2021-03-072021-03-06C4YK1820.000632 AU (94,500 km; 58,700 mi)0.25 [note 8] 1.8–5.930.3— [50]
2021-03-08 [51] 2021-03-06
G96 Mt. Lemmon Survey [52] 		2021 EF10.00187 AU (280,000 km; 174,000 mi)0.733.1–6.829.7✓
2021-03-09 [53] 2021-03-10
G96 Mt. Lemmon Survey [54] 		2021 EG30.00098 AU (147,000 km; 91,000 mi)0.383.8–8.629.2—
2021-03-102021-03-11ScKo07a0.0013 AU (190,000 km; 120,000 mi)0.51 [note 9] 0.97–5.931.0— [55]
2021-03-15 [56] 2021-03-15
T08 ATLAS-MLO, Mauna Loa [57] 		2021 EN40.00047 AU (70,000 km; 44,000 mi)0.183.1–6.929.7—
2021-03-15 [58] 2021-03-15
381 Tokyo-Kiso [59] 		2021 EP40.00248 AU (371,000 km; 231,000 mi)0.973.7–8.429.3—
2021-03-16 [60] 2021-03-11
G96 Mt. Lemmon Survey [61] 		2021 EQ30.00186 AU (278,000 km; 173,000 mi)0.7216–3626.1✓
2021-03-20 [62] 2021-03-22
G96 Mt. Lemmon Survey [63] 		2021 FM20.00056 AU (84,000 km; 52,000 mi)0.222.5–5.730.1—
2021-03-21 [64] 2021-03-22
G96 Mt. Lemmon Survey [65] 		2021 FF20.00213 AU (319,000 km; 198,000 mi)0.836.3–1428.1—
2021-03-232021-03-23B03SK220.00019 AU (28,000 km; 18,000 mi)0.074 [note 10] 0.38–2.433.0— [66]
2021-03-23 [67] 2021-03-20
G96 Mt. Lemmon Survey [68] 		2021 FO10.00215 AU (322,000 km; 200,000 mi)0.843.4–7.629.5—
2021-03-23 [69] 2021-03-18
G96 Mt. Lemmon Survey [70] 		2021 FH0.00157 AU (235,000 km; 146,000 mi)0.6112–2726.7—
2021-03-23 [71] 2021-03-22
G96 Mt. Lemmon Survey [72] 		2021 FP20.00216 AU (323,000 km; 201,000 mi)0.842.5–5.630.1—
2021-04-012021-04-01A10w8qG0.00149 AU (223,000 km; 139,000 mi)0.58 [note 11] 3.2–1228.9✓ [73]
2021-04-03 [74] 2021-04-04
G96 Mt. Lemmon Survey [75] 		2021 GE20.00161 AU (241,000 km; 150,000 mi)0.623.9–8.829.1—
2021-04-032021-04-06P11ekJ00.00188 AU (281,000 km; 175,000 mi)0.73 [note 12] 2.9–1828.6— [76]
2021-04-04 [77] 2021-04-03
G96 Mt. Lemmon Survey [78] 		2021 GV0.00224 AU (335,000 km; 208,000 mi)0.873.8–8.629.2—
2021-04-05 [79] 2021-04-03
G96 Mt. Lemmon Survey [80] 		2021 GS0.00167 AU (250,000 km; 155,000 mi)0.654.8–1128.7—
2021-04-05 [81] 2021-04-05
I41 Palomar Mountain—ZTF [82] 		2021 GZ70.00126 AU (188,000 km; 117,000 mi)0.494.3–9.628.9✓
2021-04-062021-04-07P11eyxx0.00024 AU (36,000 km; 22,000 mi)0.093 [note 13] 1.4–5.430.7— [83]
2021-04-082021-04-07A10wiOp0.00224 AU (335,000 km; 208,000 mi)0.87 [note 14] 2.8–1728.7— [84]
2021-04-08 [85] 2021-04-08
381 Tokyo-Kiso [86] 		2021 GV40.00212 AU (317,000 km; 197,000 mi)0.824.3–9.629.0—
2021-04-09 [87] 2021-04-11
T08 ATLAS-MLO, Mauna Loa [88] 		2021 GL160.00247 AU (370,000 km; 230,000 mi)0.9615–3326.3✓
2021-04-10 [89] 2021-04-06
F51 Pan-STARRS 1, Haleakala [90] 		2021 GT30.00171 AU (256,000 km; 159,000 mi)0.6714–3226.4—
2021-04-102021-04-10TMG00420.00220 AU (329,000 km; 205,000 mi)0.85 [note 15] 4.4–14.328.4— [91]
2021-04-11 [92] 2021-04-10
703 Catalina Sky Survey [93] 		2021 GQ50.00248 AU (371,000 km; 231,000 mi)0.975.3–1228.5—
2021-04-112021-04-11TMG00440.00126 AU (188,000 km; 117,000 mi)0.49 [note 16] 2.5–9.929.4— [94]
2021-04-112021-04-07P11exfR0.00244 AU (365,000 km; 227,000 mi)0.95 [note 17] 3.1–1928.5— [95]
2021-04-112021-04-11TMG00450.00156 AU (233,000 km; 145,000 mi)0.61 [note 18] 3.7–1228.8— [96]
2021-04-11 [97] 2021-04-11
381 Tokyo-Kiso [98] 		2021 GA1680.00156 AU (233,000 km; 145,000 mi)0.614.6–1028.8—
2021-04-12 [99] 2021-04-08
G96 Mt. Lemmon Survey [100] 		2021 GW4 0.00018 AU (27,000 km; 17,000 mi)0.073.4–7.629.5—
2021-04-13 [101] 2021-04-13
I41 Palomar Mountain—ZTF [102] 		2021 GC130.00228 AU (341,000 km; 212,000 mi)0.894.0–8.929.1—
2021-04-132021-04-13ZTF0KwS0.00105 AU (157,000 km; 98,000 mi)0.41 [note 19] 2.4–1529.0 ? [103]
2021-04-13 [104] 2021-04-11
V00 Kitt Peak-Bok [105] 		2021 GC80.00146 AU (218,000 km; 136,000 mi)0.572.0–4.530.6—
2021-04-14 [106] 2021-04-14
381 Tokyo-Kiso [107] 		2021 GQ100.00116 AU (174,000 km; 108,000 mi)0.4512–2826.6—
2021-04-14 [108] 2021-04-15
T08 ATLAS-MLO, Mauna Loa [109] 		2021 GW160.00020 AU (30,000 km; 19,000 mi)0.082.5–5.730.1—
2021-04-15 [110] 2021-04-17
T05 ATLAS-HKO, Haleakala [111] 		2021 HC10.00155 AU (232,000 km; 144,000 mi)0.606.8–1528.0✓
2021-04-15 [112] 2021-04-14
W94 MAP, San Pedro de Atacama [113] 		2021 GF100.00077 AU (115,000 km; 72,000 mi)0.306.2–1428.2—
2021-04-15 [114] 2021-04-14
F51 Pan-STARRS 1, Haleakala [115] 		2021 GN100.00192 AU (287,000 km; 178,000 mi)0.755.6–1228.4✓
2021-04-162021-04-17ZTF0KyD0.00213 AU (319,000 km; 198,000 mi)0.83 [note 20] 3.2–2028.4 ? [116]
2021-04-17 [117] 2021-04-18
703 Catalina Sky Survey [118] 		2021 HE10.00153 AU (229,000 km; 142,000 mi)0.594.4–9.728.9✓
2021-04-172021-04-14P11f7ua0.00108 AU (162,000 km; 100,000 mi)0.42 [note 21] 2.9–9.429.3— [119]
2021-04-172021-04-17B04SK170.00106 AU (159,000 km; 99,000 mi)0.41 [note 22] 3.1–3028.0 ? [120]
2021-04-19 [121] 2021-04-17
G96 Mt. Lemmon Survey [122] 		2021 HN0.00170 AU (254,000 km; 158,000 mi)0.6611–2526.9—
2021-04-232021-04-25A10wMMp0.000735 AU (110,000 km; 68,300 mi)0.29 [note 23] 2.5–1628.9 ? [123]
2021-04-242021-04-24ZTF0Kzz0.0016 AU (240,000 km; 150,000 mi)0.62 [note 24] 1.2–7.530.5 ? [124]
2021-05-022021-05-02S5140080.00079 AU (118,000 km; 73,000 mi)0.31 [note 25] 2.4–1529.0 ? [125]
2021-05-02 [126] 2021-05-03
T05 ATLAS-HKO, Haleakala [127] 		2021 JW0.00173 AU (259,000 km; 161,000 mi)0.678.0–1827.6—
2021-05-04 [128] 2021-05-03
T05 ATLAS-HKO, Haleakala [129] 		2021 JV0.00094 AU (141,000 km; 87,000 mi)0.368.6–1927.4—
2021-05-06 [130] 2021-05-05
G96 Mt. Lemmon Survey [131] 		2021 JS10.00074 AU (111,000 km; 69,000 mi)0.295.3–1228.5—
2021-05-072021-05-09P11gae70.00126 AU (188,000 km; 117,000 mi)0.49 [note 26] 3.1–1928.5— [132]
2021-05-08 [133] 2021-05-07
G96 Mt. Lemmon Survey [134] 		2021 JQ20.00045 AU (67,000 km; 42,000 mi)0.172.6–5.930.0—
2021-05-082021-05-09P11gae50.00057 AU (85,000 km; 53,000 mi)0.22 [note 27] 1.3–8.230.3— [135]
2021-05-092021-05-12P11ggM30.00235 AU (352,000 km; 218,000 mi)0.91 [note 28] 1.2–7.530.5— [136]
2021-05-13 [137] 2021-05-08
F51 Pan-STARRS 1, Haleakala [138] 		2021 JB60.00071 AU (106,000 km; 66,000 mi)0.274.7–1028.8—
2021-05-14 [139] 2021-05-14
I41 Palomar Mountain—ZTF [140] 		2021 JU60.00044 AU (66,000 km; 41,000 mi)0.1710–2327.1—
2021-05-27 [141] 2021-06-01
F51 Pan-STARRS 1, Haleakala [142] 		2021 LV0.00188 AU (281,000 km; 175,000 mi)0.736.9–1527.9✓
2021-05-30 [143] 2021-05-30
381 Tokyo-Kiso [144] 		2021 KO20.00248 AU (371,000 km; 231,000 mi)0.966.6–1528.0—
2021-05-302021-05-30TMG00490.000726 AU (108,600 km; 67,500 mi)0.28 [note 29] 2.2–7.129.9— [145]
2021-05-31 [146] 2021-05-30
381 Tokyo-Kiso [147] 		2021 KN20.00097 AU (145,000 km; 90,000 mi)0.385.0–1128.6—
2021-05-31 [148] 2021-05-31
381 Tokyo-Kiso [149] 		2021 KQ20.00119 AU (178,000 km; 111,000 mi)0.462.7–6.130.0—
2021-05-312021-05-31C5Q2Z320.0000774 AU (11,580 km; 7,190 mi)0.030 [note 30] 0.67–4.131.8— [150]
2021-06-01 [151] 2021-05-31
G96 Mt. Lemmon Survey [152] 		2021 KT20.00195 AU (292,000 km; 181,000 mi)0.765.6–1228.4—
2021-06-04 [153] 2021-06-05
T05 ATLAS-HKO, Haleakala [154] 		2021 LX10.00107 AU (160,000 km; 99,000 mi)0.4210–2327.1—
2021-06-12 [155] 2021-06-11
F51 Pan-STARRS 1, Haleakala [156] 		2021 LG50.00106 AU (159,000 km; 99,000 mi)0.414.8–1128.7—
2021-06-13 [157] 2021-06-08
G96 Mt. Lemmon Survey [158] 		2021 LO20.00148 AU (221,000 km; 138,000 mi)0.586.6–1528.0—
2021-06-15 [159] 2021-06-18
W94 MAP, San Pedro de Atacama [160] 		2021 MU0.00111 AU (166,000 km; 103,000 mi)0.438.8–2027.4—
2021-06-17 [161] 2021-06-17
T05 ATLAS-HKO, Haleakala [162] 		2021 ME0.00212 AU (317,000 km; 197,000 mi)0.824.3–9.629.0—
2021-07-03 [163] 2021-07-01
F51 Pan-STARRS 1, Haleakala [164] 		2021 NA0.00044 AU (66,000 km; 41,000 mi)0.175.2–1228.6—
2021-07-08 [165] 2021-07-09
F51 Pan-STARRS 1, Haleakala [166] 		2021 NU30.00120 AU (180,000 km; 112,000 mi)0.475.0–1128.6—
2021-07-20 [167] 2021-07-19
W94 MAP, San Pedro de Atacama [168] 		2021 OV0.00131 AU (196,000 km; 122,000 mi)0.517.5–1727.8✓
2021-07-31 [169] 2021-07-30
T08 ATLAS-MLO, Mauna Loa [170] 		2021 OD10.00170 AU (254,000 km; 158,000 mi)0.665.9–1328.3—
2021-08-02 [171] 2021-08-02
I41 Palomar Mountain—ZTF [172] 		2021 PC0.00110 AU (165,000 km; 102,000 mi)0.4312–2726.7—
2021-08-02 [173] 2021-08-02
T08 ATLAS-MLO [174] 		2021 PL1320.00233 AU (349,000 km; 217,000 mi)0.915.2–1228.5—
2021-08-05 [175] 2021-08-07
F51 Pan-STARRS 1, Haleakala [176] 		2021 PY40.00188 AU (281,000 km; 175,000 mi)0.7313–2926.5—
2021-08-06 [177] 2021-08-08
W94 MAP, San Pedro de Atacama [178] 		2021 PK40.00160 AU (239,000 km; 149,000 mi)0.626.1–1428.2—
2021-08-14 [179] 2021-08-15
T05 ATLAS-HKO, Haleakala [180] 		2021 PA170.00045 AU (67,000 km; 42,000 mi)0.177.3–1627.8—
2021-08-27 [181] 2021-08-27
T05 ATLAS-HKO, Haleakala [182] 		2021 QD10.00204 AU (305,000 km; 190,000 mi)0.804.8–1128.7—
2021-08-28 [183] 2021-08-30
F51 Pan-STARRS 1, Haleakala [184] 		2021 QV30.00085 AU (127,000 km; 79,000 mi)0.332.4–5.330.2—
2021-09-02 [185] 2021-09-03
I41 Palomar Mountain—ZTF [186] 		2021 RN50.00253 AU (378,000 km; 235,000 mi)0.988.1–1827.6✓
2021-09-06 [187] 2021-09-08
F51 Pan-STARRS 1, Haleakala [188] 		2021 RT40.00177 AU (265,000 km; 165,000 mi)0.696.2–1428.2—
2021-09-07 [189] 2021-09-08
F51 Pan-STARRS 1, Haleakala [190] 		2021 RS1000.00128 AU (191,000 km; 119,000 mi)0.504.7–1128.8✓
2021-09-08 [191] 2021-09-07
G96 Mt. Lemmon Survey [192] 		2021 RS20.00015 AU (22,000 km; 14,000 mi)0.062.3–5.130.4—
2021-09-08 [193] 2021-09-07
703 Catalina Sky Survey [194] 		2021 RP20.00080 AU (120,000 km; 74,000 mi)0.312.3–5.230.3✓
2021-09-08 [195] 2021-09-09
K88 GINOP-KHK, Piszkesteto [196] 		2021 RS50.00092 AU (138,000 km; 86,000 mi)0.365.7–1328.3—
2021-09-09 [197] 2021-09-05
T05 ATLAS-HKO, Haleakala [198] 		2021 RQ20.00126 AU (188,000 km; 117,000 mi)0.493.3–7.329.5—
2021-09-09 [199] 2021-09-10
703 Catalina Sky Survey [200] 		2021 RB60.00172 AU (257,000 km; 160,000 mi)0.676.6–1528.0—
2021-09-11 [201] 2021-09-10
T05 ATLAS-HKO, Haleakala [202] 		2021 RG60.00057 AU (85,000 km; 53,000 mi)0.224.4–9.828.9—
2021-09-11 [203] 2021-09-12
T08 ATLAS-MLO, Mauna Loa [204] 		2021 RG120.00217 AU (325,000 km; 202,000 mi)0.843.9–8.729.2—
2021-09-12 [205] 2021-09-08
G96 Mt. Lemmon Survey [206] 		2021 RR50.00053 AU (79,000 km; 49,000 mi)0.205.6–1228.4—
2021-09-16 [207] 2021-09-13
F51 Pan-STARRS 1, Haleakala [208] 		2021 RF160.00213 AU (319,000 km; 198,000 mi)0.834.3–9.629.0—
2021-09-16 [209] 2021-09-17
I41 Palomar Mountain—ZTF [210] 		2021 SG 0.00164 AU (245,000 km; 152,000 mi)0.6442–9424.0—
2021-09-17 [211] 2021-09-17
I41 Palomar Mountain—ZTF [212] 		2021 SP9.43×10−5 AU (1.411×104 km; 8.77×103 mi)0.043.7–8.329.3—
2021-09-20 [213] 2021-09-23
F51 Pan-STARRS 1, Haleakala [214] 		2021 SQ0.00184 AU (275,000 km; 171,000 mi)0.725.5–1228.4✓
2021-09-26 [215] 2021-09-28
F52 Pan-STARRS 2, Haleakala [216] 		2021 SW10.00182 AU (272,000 km; 169,000 mi)0.712.9–6.529.8—
2021-09-27 [217] 2021-09-28
T05 ATLAS-HKO, Haleakala [218] 		2021 SQ10.00111 AU (166,000 km; 103,000 mi)0.434.6–1028.8—
2021-09-30 [219] 2021-10-02
G96 Mt. Lemmon Survey [220] 		2021 TT0.00089 AU (133,000 km; 83,000 mi)0.347.2–1627.8—
2021-10-01 [221] 2021-10-02
F52 Pan-STARRS 2, Haleakala [222] 		2021 TX0.00028 AU (42,000 km; 26,000 mi)0.111.5–3.531.2—
2021-10-03 [223] 2021-10-03
T08 ATLAS-MLO, Mauna Loa [224] 		2021 TV10.00108 AU (162,000 km; 100,000 mi)0.426.5–1428.1—
2021-10-03 [225] 2021-10-03
G96 Mt. Lemmon Survey [226] 		2021 TG10.00196 AU (293,000 km; 182,000 mi)0.766.1–1428.2—
2021-10-06 [227] 2021-10-06
381 Tokyo-Kiso [228] 		2021 TQ40.00255 AU (381,000 km; 237,000 mi)0.992.8–6.229.9—
2021-10-10 [229] 2021-10-03
F52 Pan-STARRS 2, Haleakala [230] 		2021 TT10.00251 AU (375,000 km; 233,000 mi)0.9715–3426.2✓
2021-10-11 [231] 2021-10-11
T05 ATLAS-HKO, Haleakala [232] 		2021 TK110.00091 AU (136,000 km; 85,000 mi)0.354.9–1128.7—
2021-10-11 [233] 2021-10-11
T05 ATLAS-HKO, Haleakala [234] 		2021 TT130.00036 AU (54,000 km; 33,000 mi)0.142.9–6.529.8—
2021-10-11 [235] 2021-10-13
F51 Pan-STARRS 1, Haleakala [236] 		2021 TH150.00211 AU (316,000 km; 196,000 mi)0.824.5–1028.8✓
2021-10-12 [237] 2021-10-13
G96 Mt. Lemmon Survey [238] 		2021 TE130.00018 AU (27,000 km; 17,000 mi)0.073.7–8.229.3—
2021-10-14 [239] 2021-10-14
T05 ATLAS-HKO, Haleakala [240] 		2021 TM140.00098 AU (147,000 km; 91,000 mi)0.386.7–1528.0—
2021-10-16 [241] 2021-10-16
703 Catalina Sky Survey [242] 		2021 UL0.00024 AU (36,000 km; 22,000 mi)0.092.3–5.230.3✓
2021-10-16 [243] 2021-10-14
G96 Mt. Lemmon Survey [244] 		2021 TJ150.00257 AU (384,000 km; 239,000 mi)1.005.6–1328.4—
2021-10-18 [245] 2021-10-11
F51 Pan-STARRS 1, Haleakala [246] 		2021 TG140.00167 AU (250,000 km; 155,000 mi)0.656.0–1428.2—
2021-10-24 [247] 2021-10-24
K88 GINOP-KHK, Piszkesteto [248] 		2021 UT0.00100 AU (150,000 km; 93,000 mi)0.393.6–8.129.3—
2021-10-25 [249] 2021-10-26
G96 Mt. Lemmon Survey [250] 		2021 UO10.00102 AU (153,000 km; 95,000 mi)0.406.7–1528.0—
2021-10-25 [251] 2021-10-25
703 Catalina Sky Survey [252] 		2021 UA1 6.30×10−5 AU (9.42×103 km; 5.86×103 mi)0.021.2–2.631.8—
2021-10-27 [2] 2021-10-28
G96 Mt. Lemmon Survey [253] 		2021 UA70.00086 AU (129,000 km; 80,000 mi)0.334.7–1128.8—
2021-10-27 [254] 2021-10-26
G96 Mt. Lemmon Survey [255] 		2021 UH10.00048 AU (72,000 km; 45,000 mi)0.191.3–2.831.6—
2021-10-29 [256] 2021-10-30
W94 MAP, San Pedro de Atacama [257] 		2021 UV50.00077 AU (115,000 km; 72,000 mi)0.304.6–1028.8—
2021-10-29 [258] 2021-10-31
K88 GINOP-KHK, Piszkesteto [259] 		2021 UT50.00205 AU (307,000 km; 191,000 mi)0.805.8–1328.3—
2021-10-29 [260] 2021-10-29
381 Tokyo-Kiso [261] 		2021 UF120.00161 AU (241,000 km; 150,000 mi)0.633.7–8.229.3—
2021-10-30 [262] 2021-10-27
G96 Mt. Lemmon Survey [263] 		2021 UW10.00256 AU (383,000 km; 238,000 mi)0.9916–3526.1—
2021-10-30 [264] 2021-10-31
T08 ATLAS-MLO, Mauna Loa [265] 		2021 UJ60.00232 AU (347,000 km; 216,000 mi)0.906.0–1328.3—
2021-11-01 [266] 2021-11-02
T08 ATLAS-MLO, Mauna Loa [267] 		2021 VH0.00020 AU (30,000 km; 19,000 mi)0.083.2–7.129.6—
2021-11-04 [268] 2021-10-31
F51 Pan-STARRS 1, Haleakala [269] 		2021 UO70.00247 AU (370,000 km; 230,000 mi)0.963.3–7.329.6—
2021-11-07 [270] 2021-11-11
G96 Mt. Lemmon Survey [271] 		2021 VS110.00204 AU (305,000 km; 190,000 mi)0.792.2–4.828.7—
2021-11-07 [272] 2021-11-06
G96 Mt. Lemmon Survey [273] 		2021 VK30.00057 AU (85,000 km; 53,000 mi)0.222.2–4.830.5—
2021-11-08 [274] 2021-11-07
T08 ATLAS-MLO, Mauna Loa [275] 		2021 VL30.00111 AU (166,000 km; 103,000 mi)0.435.5–1228.4—
2021-11-08 [276] 2021-11-07
G96 Mt. Lemmon Survey [277] 		2021 VN30.00092 AU (138,000 km; 86,000 mi)0.362.0–4.630.6—
2021-11-08 [278] 2021-11-07
G96 Mt. Lemmon Survey [279] 		2021 VM30.00204 AU (305,000 km; 190,000 mi)0.792.9–6.529.8—
2021-11-09 [280] 2021-11-10
G96 Mt. Lemmon Survey [281] 		2021 VD80.00083 AU (124,000 km; 77,000 mi)0.322.4–5.430.2—
2021-11-09 [282] 2021-11-09
G96 Mt. Lemmon Survey [283] 		2021 VP110.00039 AU (58,000 km; 36,000 mi)0.151.2–2.631.8—
2021-11-10 [284] 2021-11-08
F52 Pan-STARRS 2, Haleakala [285] 		2021 VU40.00072 AU (108,000 km; 67,000 mi)0.285.6–1328.4—
2021-11-11 [286] 2021-11-10
G96 Mt. Lemmon Survey [287] 		2021 VY70.00214 AU (320,000 km; 199,000 mi)0.833.7–8.329.3—
2021-11-12 [288] 2021-11-10
G96 Mt. Lemmon Survey [289] 		2021 VC70.00124 AU (186,000 km; 115,000 mi)0.486.1–1428.2—
2021-11-21 [290] 2021-11-24
T08 ATLAS-MLO, Mauna Loa [291] 		2021 WP0.00104 AU (156,000 km; 97,000 mi)0.416.7–1528.0—
2021-11-26 [292] 2021-11-27
703 Catalina Sky Survey [293] 		2021 WA10.00206 AU (308,000 km; 191,000 mi)0.808.2–1827.5✓
2021-11-28 [294] 2021-11-27
G96 Mt. Lemmon Survey [295] 		2021 WC10.00136 AU (203,000 km; 126,000 mi)0.535.4–1228.5—
2021-11-30 [296] 2021-12-02
G96 Mt. Lemmon Survey [297] 		2021 XV0.00136 AU (203,000 km; 126,000 mi)0.392.6–5.830.1—
2021-12-01 [298] 2021-11-29
G96 Mt. Lemmon Survey [299] 		2021 WF30.00096 AU (144,000 km; 89,000 mi)0.373.5–7.929.4—
2021-12-01 [300] 2021-12-02
I41 Palomar Mountain—ZTF [301] 		2021 XL0.00135 AU (202,000 km; 125,000 mi)0.534.5–1028.9—
2021-12-04 [302] 2021-12-02
G96 Mt. Lemmon Survey [303] 		2021 XF10.00206 AU (308,000 km; 191,000 mi)0.803.3–7.429.5—
2021-12-05 [304] 2021-12-03
G96 Mt. Lemmon Survey [305] 		2021 XC20.00212 AU (317,000 km; 197,000 mi)0.823.0–6.729.8—
2021-12-09 [306] 2021-12-12
G96 Mt. Lemmon Survey [307] 		2021 XZ50.00214 AU (320,000 km; 199,000 mi)0.835.8–1328.3✓
2021-12-09 [308] 2021-12-08
G96 Mt. Lemmon Survey [309] 		2021 XU50.00160 AU (239,000 km; 149,000 mi)0.623.6–8.029.4✓
2021-12-10 [310] 2021-12-08
G96 Mt. Lemmon Survey [311] 		2021 XV40.00120 AU (180,000 km; 112,000 mi)0.475.2–1228.6—
2021-12-11 [312] 2021-12-08
G96 Mt. Lemmon Survey [313] 		2021 XX40.00251 AU (375,000 km; 233,000 mi)0.985.2–1228.5—
2021-12-16 [314] 2021-12-12
G96 Mt. Lemmon Survey [315] 		2021 XC60.00140 AU (209,000 km; 130,000 mi)0.546.0–1328.2✓

Warning times by size

This sub-section visualises the warning times of the close approaches listed in the above table, depending on the size of the asteroid. It shows the effectiveness of asteroid warning systems at detecting close approaches in 2021. The sizes of the charts show the relative sizes of the asteroids to scale. For comparison, the approximate size of a person is also shown. This is based the absolute magnitude of each asteroid, an approximate measure of size based on brightness. [1]

Absolute magnitude 30 and greater

Silhouette of man standing and facing forward Silhouette of man standing and facing forward.svg
Silhouette of man standing and facing forward

(size of a person for comparison)

Circle frame.svgAfter closest approach: 17 (50.0%)< 24 hours before: 6 (17.6%)up to 7 days before: 11 (32.4%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute magnitude 29-30

Circle frame.svgAfter closest approach: 15 (38.5%)< 24 hours before: 8 (20.5%)up to 7 days before: 16 (41.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute magnitude 28-29

Circle frame.svgAfter closest approach: 31 (44.9%)< 24 hours before: 17 (24.6%)up to 7 days before: 21 (30.4%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute magnitude 27-28

Circle frame.svgAfter closest approach: 10 (71.4%)< 24 hours before: 1 (7.1%)up to 7 days before: 3 (21.4%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute magnitude 26-27 (probable size of the Chelyabinsk meteor)

Circle frame.svgAfter closest approach: 3 (27.3%)< 24 hours before: 1 (9.1%)up to 7 days before: 6 (54.5%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 1 (9.1%)

Absolute magnitude 25-26

Circle frame.svgAfter closest approach: 0 (0.0%)< 24 hours before: 0 (0.0%)up to 7 days before: 1 (100.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute magnitude less than 25 (largest)

Circle frame.svgAfter closest approach: 1 (100.0%)< 24 hours before: 0 (0.0%)up to 7 days before: 0 (0.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)
  •   After closest approach: 1 (100.0%)
  •   < 24 hours before: 0 (0.0%)
  •   up to 7 days before: 0 (0.0%)
  •   > one week before: 0 (0.0%)
  •   > 7 weeks before: 0 (0.0%)
  •   > one year before: 0 (0.0%)

Predicted close approaches

Below is the list of predicted close approaches of near-Earth asteroids larger than magnitude 27, that were predicted to occur in 2021. [note 1] This relates to the effectiveness of asteroid cataloging systems at predicting close approaches in 2021. 2018 BA3 (with a 9 day observation arc from January 2018) could have passed as far as 3 million km (8 LD) from Earth. [21]

For asteroids which were observed but not predicted in advance, see the main list above.

  Rows highlighted orange indicate objects which were predicted theoretically but were not observed in practice

  Rows highlighted yellow indicate objects which were predicted and observed but the predicted close approach date and distance were incorrect

  Rows highlighted green indicate objects which were observed with the predicted close approach distance (within +/-50%) but wrong date

  Rows highlighted turquoise indicate objects which were observed with the predicted close approach date but wrong distance (out by over 50%)

  Rows highlighted blue indicate objects which were observed as predicted with the correct close approach date and distance

Object Predicted Date of closest approachActual Date of closest approachPredicted closest approach range (Lunar
distance)		Actual closest approach distance (Lunar
distance)		(H)
(abs. mag)		Approx. Size (m)
2018 BA32021-01-26 ±7 days [21] Not observed in 2021 [22] 0.74–8.2 (0.97 nominal)Not observed in 202126.414–31

Notes

  1. 1 2 Absolute magnitude 27 is the estimated magnitude of the Chelyabinsk meteor, which caused widespread damage and injury, but no deaths. Objects smaller than this are excluded.
  2. ↑ 2021 UA7 passed Earth with a velocity with respect to Earth of 27.7 km/s and was moving away from the Sun at 37.0 km/s.
  3. ↑ Discovery date, and if the object was confirmed and previously undiscovered, the discoverer
  4. ↑ Distance from the center of Earth to the center of the object. See the NASA/JPL Solar System Dynamics Glossary: Geocentric. Earth has a radius of approximately 6,400 km (0.0166 LD).
  5. ↑ Objects that approached closer to the Moon than Earth are marked with a check.
  6. ↑ For unconfirmed asteroids, the provided distance range is for the 25th and 75th percentile. As a result, there is a 50% chance the asteroid's approach distance was outside of this range. Additionally, the uncertainty is usually asymmetric, so an asteroid at a nominal distance of 0.4-0.7 LD may have been more likely to only approach to 1.0 LD than to 0.3 LD.
  7. ↑ Distance error: 0.0015 AU, approach range: 0.27 to 1.40 LD. There was a roughly 0.6% chance of impact.
  8. ↑ Distance error: 0.000097 AU, approach range: 0.21 to 0.28 LD.
  9. ↑ Distance error: 0.0005 AU, approach range: 0.28 to 0.66 LD.
  10. ↑ Distance error: 0.00011 AU, approach range 0.037 to 0.12 LD. There was a roughly 11.7% chance of impact.
  11. ↑ Distance error: 0.000082 AU, approach range: 0.55 to 0.61 LD.
  12. ↑ Distance error: 0.0015 AU, approach range: 0.40 to 1.67 LD.
  13. ↑ Distance error: 0.00004 AU, approach range: 0.082 to 0.11 LD.
  14. ↑ Distance error: 0.0008 AU, approach range: 0.64 to 1.28 LD.
  15. ↑ Distance error: 0.00000182 AU, approach range: 0.854 to 0.856 LD.
  16. ↑ Distance error: 0.0000170 AU, approach range: 0.48 to 0.51 LD.
  17. ↑ Distance error: >0.001 AU, approach range: 0.18 to 93 LD. Although highly asymmetric, there is still a 56% chance the asteroid passed within 2 LD of Earth, and a 15% chance it passed within 7 Earth radii of the planet.
  18. ↑ Distance error: 0.000000822 AU.
  19. ↑ Distance error: 0.0009 AU, approach range: 0.13 to 0.86 LD. There was a roughly 2.2% chance of impact.
  20. ↑ Distance uncertainty: 0.00070 AU, approach range: 0.58 to 1.07 LD.
  21. ↑ Distance error: 0.000166 AU, approach range: 0.35 to 0.48 LD.
  22. ↑ Distance error: 0.0009 AU, approach range: 0.14 to 0.89 LD.
  23. ↑ Distance error: 0.00078 AU, approach range: 0.077 to 0.70 LD. There was a roughly 5% chance of impact.
  24. ↑ Distance error: highly asymmetric, approach range: 0.011 to 30.7 LD. There was a roughly 38% chance of impact.
  25. ↑ Distance error: 0.001 AU, approach range: 0.066 to 0.86 LD. There was a roughly 12.1% chance of impact.
  26. ↑ Distance error: 0.0004 AU, approach range: 0.37 to 0.68 LD.
  27. ↑ Distance error: 0.00022 AU, approach range: 0.16 to 0.38 LD.
  28. ↑ Distance error: 0.0010 AU, approach range: 0.61 to 1.51 LD.
  29. ↑ Distance error: 0.00000017 AU, approach range: 0.2824 to 0.2825 LD.
  30. ↑ Distance error: 0.00002 AU, approach range: 0.024 to 0.041 LD. There was a roughly 5.6% chance of impact.

Additional examples

Confirmed Earth approaches in 2021
Passed within#
1  LD (384,400  km )145
5 LD (1,922,000 km)586
10 LD (3,844,000 km)1018
0.05 AU (19 LD)1584
0.1 AU (39 LD)2312
0.2 AU (78 LD)3391
Goldstone radar images of asteroid 99942 Apophis on 8-10 March 2021 PIA24168-Asteroid-99942Apophis-RadarImages-20210326.jpg
Goldstone radar images of asteroid 99942 Apophis on 8–10 March 2021
Goldstone radar images of asteroid 2001 FO32 during closest approach on 21 March 2021 2001FO32 Goldstone radar PIA24561.jpg
Goldstone radar images of asteroid 2001 FO32 during closest approach on 21 March 2021

Below is an example list of near-Earth asteroids that passed or will pass more than 1 lunar distance (384,400 km or 0.00256 AU) from Earth in 2021.

ObjectSize
(meters)		Nearest approach
(lunar
distances)		DateRef
2018 RB120-26018.272021-02-07 JPL  · CAD
(456537) 2007 BG330-75022.352021-02-26 JPL  · CAD
2016 DV1 29-652.12021-03-03 JPL  · CAD
2021 DW1 301.482021-03-04 JPL  · CAD
99942 Apophis 37043.852021-03-06 JPL  · CAD
(231937) 2001 FO32 5505.252021-03-21 JPL  · CAD
(441987) 2010 NY65140-31015.542021-06-25 JPL  · CAD
2021 LD11,200 [316] 11.782021-07-09 JPL  · CAD
(285571) 2000 PQ9640-1,40026.162021-07-21 JPL  · CAD
2008 GO2097-22011.782021-07-25 JPL  · CAD
2018 LM4460-1,00031.852021-08-06 JPL  · CAD
2016 AJ193 1,3748.922021-08-21 JPL  · CAD
2019 XS 48-1101.492021-11-09 JPL  · CAD
3361 Orpheus 30015.012021-11-21 JPL  · CAD
1994 WR12 13016.002021-11-29 JPL  · CAD
4660 Nereus 33010.232021-12-11 JPL  · CAD
(163899) 2003 SD220 79014.122021-12-17 JPL  · CAD
2018 AH [note2 1] 80-17012.182021-12-27 JPL  · CAD
Planet Venus [note2 2] —107.42021-12-31 JPL

Notes

  1. ↑ Short arc object that had not been observed for years and therefore the uncertainty was relatively large.
  2. ↑ For comparison as closest Venus approach is 2022-Jan-08 at 103 LD. (Earth will be at perihelion on 2022-Jan-04.)

See also

Related Research Articles

<span class="mw-page-title-main">Spacewatch</span> Astronomical survey that specializes in the study of minor planets

The Spacewatch Project is an astronomical survey that specializes in the study of minor planets, including various types of asteroids and comets at University of Arizona telescopes on Kitt Peak near Tucson, Arizona, in the United States. The Spacewatch Project has been active longer than any other similar currently active programs.

1993 RP is a trans-Neptunian object discovered by astronomers David Jewitt and Jane Luu at Mauna Kea Observatory on 15 September 1993. It was one of the first few trans-Neptunian objects discovered after Pluto and Charon, but it was not observed long enough to determine its orbit and ended up becoming lost for over two decades. 1993 RP was serendipitously reobserved in 2015–2016 by Edward Ashton, John Kavelaars, and Brett Gladman at Mauna Kea Observatory, but was announced as a new trans-Neptunian object under the provisional designation 2015 VR202. 2015 VR202 was not recognized to be the same object as 1993 RP until it was identified by Peter VanWylen on 14 August 2023.

(152680) 1998 KJ9 is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group. Based on absolute magnitude, it is the third largest asteroid known to have passed closer than the Moon.

<span class="nowrap">2018 PD<sub>20</sub></span>

2018 PD20 is a small asteroid, classified as a near-Earth object of the Apollo group, approximately 9–20 meters (30–66 feet) in diameter. On 11 August 2018, it was first observed by ATLAS at the Mauna Loa Observatory on Hawaii (T08), when it passed 33,500 kilometers (20,800 miles) from the Earth. This is notable because it came within a tenth of the lunar distance, or 0.10 LD which is closer to Earth than satellites in a geostationary orbit. These have an altitude of 0.11 LD, about 36,000 km (22,000 mi), approximately 3 times the width of the Earth.

2020 UA is a tiny near-Earth asteroid around 5–12 metres (16–39 ft) across that passed within 46,100 km (28,600 mi) of Earth on 21 October 2020 at 02:00 UT.

2019 BE5 is a sub-kilometer near-Earth asteroid classified under the Aten group. It was discovered on 31 January 2019, by the Zwicky Transient Facility at the Palomar Observatory. The asteroid was discovered one day after it had made a close approach to Earth from a distance of 0.00784 AU (1.173 million km; 3.05 LD).

2020 VT4 is a tiny near-Earth asteroid that passed 370 km (230 mi) above Earth's surface on 13 November 2020 at 17:20 UTC. The asteroid was discovered by the Asteroid Terrestrial-impact Last Alert System (ATLAS) survey at the Mauna Loa Observatory fifteen hours after its closest approach to Earth. The Earth encounter perturbed the asteroid's trajectory from an Earth-crossing Apollo-type orbit to an Aten-type orbit, subsequently reducing the asteroid's heliocentric orbital period from 1.5 years to 0.86 years.

2020 SL1 is a near-Earth asteroid of the Apollo group, discovered by the Pan-STARRS 1 survey at Haleakala Observatory, Hawaii on 18 September 2020. With an estimated diameter of 0.9–2.0 km (0.56–1.24 mi), it is the largest potentially hazardous asteroid discovered in 2020.

2020 SW is a tiny near-Earth asteroid discovered by the Mount Lemmon Survey on 18 September 2020, six days before it made its closest approach to Earth. The asteroid passed within 21,600 kilometres (13,400 mi) from Earth's surface on 24 September 2020 11:13 UT, within the geostationary altitude of 36,000 kilometres (22,000 mi). The encounter with Earth perturbed the asteroid's heliocentric trajectory from an Apollo-type orbit to an Aten-type orbit with a semi-major axis within one astronomical unit from the Sun. As a result, the asteroid will not make any close approaches to Earth within 0.01 astronomical units (4 LD) in the next 200 years.

<span class="nowrap">2021 PH<sub>27</sub></span> Near-Earth asteroid of the Atira group

2021 PH27 is a near-Earth asteroid of the Atira group. It was discovered by Scott Sheppard using the Dark Energy Survey's DECam imager at NOIRLab's Cerro Tololo Inter-American Observatory on 13 August 2021. 2021 PH27 has the smallest semi-major axis and shortest orbital period among all known asteroids as of 2021, with a velocity at perihelion of 106 km/s (240,000 mph). It also has the largest value of the relativistic perihelion shift, 1.6 times that of Mercury. With an absolute magnitude of 17.7, the asteroid is estimated to be larger than 1 kilometer (0.6 miles) in diameter.

<span class="nowrap">(620094) 2016 AJ<sub>193</sub></span>

(620094) 2016 AJ193 (provisional designation 2016 AJ193; also known as 2010 KV134) is a near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.4 kilometres (0.87 mi) in diameter. It was discovered on 17 May 2010 by the Wide-field Infrared Survey Explorer (WISE) satellite, but was lost until it was reobserved on 16 January 2016. With an observation arc over 11 years, 2016 AJ193 has a well-determined orbit and trajectory through the year 2086. The asteroid's orbit is only potentially hazardous on a time scale of thousands of years.

<span class="mw-page-title-main">2021 SG</span> Near-Earth asteroid

2021 SG is a near-Earth asteroid, with an estimated diameter of 42 to 94 meters, that passed about half a lunar distance from Earth on 16 September 2021. It approached from the direction of the Sun, so it was invisible until a day later. It completes its highly eccentric orbit in 2.24 years. 2021 SG is an Apollo asteroid with a 1.71 AU semimajor axis, and a 0.473 AU perihelion out to a 2.95 AU aphelion. With an absolute magnitude (H) of 24.0, it is possibly the largest asteroid to pass within 1 lunar distance of Earth during 2021.

2021 DR15 is a large trans-Neptunian object in the scattered disc, around 700 kilometres (430 miles) in diameter. It was discovered on 17 February 2021, by American astronomers Scott Sheppard, David Tholen, and Chad Trujillo using the 8.2-meter Subaru Telescope of the Mauna Kea Observatories in Hawaii, and announced on 17 December 2021. It was 89.4 astronomical units from the Sun when it was discovered, making it the ninth-most distant known Solar System object from the Sun as of December 2021. It has been identified in several precovery images as far back as 10 March 2005.

2019 EU5 is an extreme trans-Neptunian object from the scattered disc on a highly eccentric orbit in the outermost region of the Solar System. It was discovered on 5 March 2019, by American astronomers Scott Sheppard, David Tholen, and Chad Trujillo at Mauna Kea Observatories in Hawaii, and announced on 17 December 2021. It was 83.4 astronomical units from the Sun when it was discovered, making it one of the most distant known Solar System objects from the Sun as of December 2021. It has been identified in precovery images from 6 January 2016.

<span class="nowrap">2022 EB<sub>5</sub></span> 2022 asteroid-type meteoroid

2022 EB5 was a small, two-metre Apollo near-Earth asteroid that disintegrated in Earth's atmosphere at 21:22 UTC on 11 March 2022, over the Arctic Ocean southwest of the Norwegian island Jan Mayen. With an atmospheric entry speed of 18 km/s (11 mi/s), the asteroid's impact generated a 4-kiloton-equivalent fireball that was detected by infrasound from Greenland and Norway. A bright flash possibly associated with the event was reported by observers from Northern Iceland.

2021 LL37 is a large trans-Neptunian object in the scattered disc, around 600 kilometres (370 miles) in diameter. It was discovered on 12 June 2021, by American astronomers Scott Sheppard and Chad Trujillo using Cerro Tololo Inter-American Observatory's Dark Energy Camera in Chile, and announced on 31 May 2022. It was 73.9 astronomical units from the Sun when it was discovered, making it one of the most distant known Solar System objects from the Sun as of May 2022. It has been identified in precovery images from as far back as 28 April 2014.

2021 RR205 is an extreme trans-Neptunian object discovered by astronomers Scott Sheppard, David Tholen, and Chad Trujillo with the Subaru Telescope at Mauna Kea Observatory on 5 September 2021. It resides beyond the outer extent of the Kuiper belt on a distant and highly eccentric orbit detached from Neptune's gravitational influence, with a large perihelion distance of 55.5 astronomical units (AU). Its large orbital semi-major axis (~1,000 AU) suggests it is potentially from the inner Oort cloud. 2021 RR205 and 2013 SY99 both lie in the 50–75 AU perihelion gap that separates the detached objects from the more distant sednoids; dynamical studies indicate that such objects in the inner edge this gap weakly experience "diffusion", or inward orbital migration due to minuscule perturbations by Neptune. While Sheppard considers 2021 RR205 a sednoid, researchers Yukun Huang and Brett Gladman do not.

References

  1. 1 2 "NEO Earth Close Approaches". Center for Near Earth Object Studies. Jet Propulsion Laboratory. Retrieved 3 March 2021.
  2. 1 2 "JPL Small-Body Database Browser: (2021 UA7)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  3. ↑ "JPL Small-Body Database Browser: (2021 AA)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  4. ↑ "2021 AA". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  5. ↑ "JPL Small-Body Database Browser: (2021 AH)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  6. ↑ "2021 AH". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  7. ↑ "JPL Small-Body Database Browser: (2021 AH8)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  8. ↑ "2021 AH8". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  9. ↑ "JPL Small-Body Database Browser: (2021 AS2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  10. ↑ "2021 AS2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  11. ↑ "JPL Small-Body Database Browser: (2021 BR2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  12. ↑ "2021 BR2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  13. ↑ "JPL Small-Body Database Browser: (2021 BK)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  14. ↑ "2021 BK". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  15. ↑ "JPL Small-Body Database Browser: (2021 BV1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  16. ↑ "2021 BV1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  17. ↑ "JPL Small-Body Database Browser: (2021 BO)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  18. ↑ "2021 BO". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  19. ↑ "JPL Small-Body Database Browser: (2021 BO1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  20. ↑ "2021 BO1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  21. 1 2 3 "JPL Small-Body Database Browser: (2018 BA3)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  22. 1 2 "2018 BA3". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  23. ↑ "JPL Small-Body Database Browser: (2021 CV)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  24. ↑ "2021 CV". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  25. ↑ "JPL Small-Body Database Browser: (2021 CZ3)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  26. ↑ "2021 CZ3". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  27. ↑ "JPL Small-Body Database Browser: (2021 CO)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  28. ↑ "2021 CO". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  29. ↑ "JPL Small-Body Database Browser: (2021 CQ5)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  30. ↑ "2021 CQ5". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  31. ↑ "JPL Small-Body Database Browser: (2021 CC6)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  32. ↑ "2021 CC6". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  33. ↑ "JPL Small-Body Database Browser: (2021 CC7)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  34. ↑ "2021 CC7". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  35. ↑ "JPL Small-Body Database Browser: (2021 CA6)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  36. ↑ "2021 CA6". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  37. ↑ "JPL Small-Body Database Browser: (2021 CS6)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  38. ↑ "2021 CS6". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  39. ↑ "JPL Small-Body Database Browser: (2021 CW7)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  40. ↑ "2021 CW7". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  41. ↑ "JPL Small-Body Database Browser: (2021 DN1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  42. ↑ "2021 DN1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  43. ↑ "JPL Small-Body Database Browser: (2021 DG)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  44. ↑ "2021 DG". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  45. ↑ "JPL Small-Body Database Browser: (2021 DA2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  46. ↑ "2021 DA2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  47. ↑ Gray, Bill (7 March 2021). ""Pseudo-MPEC" for C4YK182". Project Pluto. Archived from the original on 12 March 2021. Retrieved 9 March 2021.
  48. ↑ "JPL Small-Body Database Browser: (2021 EA)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  49. ↑ "2021 EA". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  50. ↑ Gray, Bill (7 March 2021). ""Pseudo-MPEC" for C4YK182". Project Pluto. Archived from the original on 12 March 2021. Retrieved 9 March 2021.
  51. ↑ "JPL Small-Body Database Browser: (2021 EF1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  52. ↑ "2021 EF1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  53. ↑ "JPL Small-Body Database Browser: (2021 EG3)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  54. ↑ "2021 EG3". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  55. ↑ Gray, Bill (15 March 2021). ""Pseudo-MPEC" for ScKo07a". Project Pluto. Archived from the original on 15 March 2021. Retrieved 15 March 2021.
  56. ↑ "JPL Small-Body Database Browser: (2021 EN4)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  57. ↑ "2021 EN4". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  58. ↑ "JPL Small-Body Database Browser: (2021 EP4)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  59. ↑ "2021 EP4". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  60. ↑ "JPL Small-Body Database Browser: (2021 EQ3)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  61. ↑ "2021 EQ3". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  62. ↑ "JPL Small-Body Database Browser: (2021 FM2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  63. ↑ "2021 FM2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  64. ↑ "JPL Small-Body Database Browser: (2021 FF2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  65. ↑ "2021 FF2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  66. ↑ Gray, Bill (27 March 2021). ""Pseudo-MPEC" for B03SK22". Project Pluto. Archived from the original on 27 March 2021. Retrieved 27 March 2021.
  67. ↑ "JPL Small-Body Database Browser: (2021 FO1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  68. ↑ "2021 FO1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  69. ↑ "JPL Small-Body Database Browser: (2021 FH)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  70. ↑ "2021 FH". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  71. ↑ "JPL Small-Body Database Browser: (2021 FP2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  72. ↑ "2021 FP2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  73. ↑ Gray, Bill (4 April 2021). ""Pseudo-MPEC" for A10w8qG". Project Pluto. Archived from the original on 4 April 2021. Retrieved 4 April 2021.
  74. ↑ "JPL Small-Body Database Browser: (2021 GE2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  75. ↑ "2021 GE2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  76. ↑ Gray, Bill (8 April 2021). ""Pseudo-MPEC" for P11ekJ0". Project Pluto. Archived from the original on 8 April 2021. Retrieved 8 April 2021.
  77. ↑ "JPL Small-Body Database Browser: (2021 GV)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  78. ↑ "2021 GV". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  79. ↑ "JPL Small-Body Database Browser: (2021 GS)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  80. ↑ "2021 GS". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  81. ↑ "JPL Small-Body Database Browser: (2021 GZ7)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  82. ↑ "2021 GZ7". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  83. ↑ Gray, Bill (10 April 2021). ""Pseudo-MPEC" for P11eyxx". Project Pluto. Archived from the original on 10 April 2021. Retrieved 10 April 2021.
  84. ↑ Gray, Bill (7 April 2021). ""Pseudo-MPEC" for A10wiOp". Project Pluto. Archived from the original on 7 April 2021. Retrieved 7 April 2021.
  85. ↑ "JPL Small-Body Database Browser: (2021 GV4)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  86. ↑ "2021 GV4". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  87. ↑ "JPL Small-Body Database Browser: (2021 GL16)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  88. ↑ "2021 GL16". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  89. ↑ "JPL Small-Body Database Browser: (2021 GT3)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  90. ↑ "2021 GT3". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  91. ↑ Gray, Bill (16 April 2021). ""Pseudo-MPEC" for TMG0042". Project Pluto. Archived from the original on 18 April 2021. Retrieved 18 April 2021.
  92. ↑ "JPL Small-Body Database Browser: (2021 GQ5)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  93. ↑ "2021 GQ5". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  94. ↑ Gray, Bill (18 April 2021). ""Pseudo-MPEC" for TMG0044". Project Pluto. Archived from the original on 18 April 2021. Retrieved 18 April 2021.
  95. ↑ Gray, Bill (10 April 2021). ""Pseudo-MPEC" for P11exfR". Project Pluto. Archived from the original on 10 April 2021. Retrieved 10 April 2021.
  96. ↑ Gray, Bill (17 April 2021). ""Pseudo-MPEC" for TMG0045". Project Pluto. Archived from the original on 18 April 2021. Retrieved 18 April 2021.
  97. ↑ "JPL Small-Body Database Browser: (2021 GA168)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  98. ↑ "2021 GA168". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  99. ↑ "JPL Small-Body Database Browser: (2021 GW4)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  100. ↑ "2021 GW4". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  101. ↑ "JPL Small-Body Database Browser: (2021 GC13)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  102. ↑ "2021 GC13". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  103. ↑ Gray, Bill (18 April 2021). ""Pseudo-MPEC" for ZTF0KwS". Project Pluto. Archived from the original on 18 April 2021. Retrieved 18 April 2021.
  104. ↑ "JPL Small-Body Database Browser: (2021 GC8)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  105. ↑ "2021 GC8". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  106. ↑ "JPL Small-Body Database Browser: (2021 GQ10)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  107. ↑ "2021 GQ10". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  108. ↑ "JPL Small-Body Database Browser: (2021 GW16)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  109. ↑ "2021 GW16". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  110. ↑ "JPL Small-Body Database Browser: (2021 HC1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  111. ↑ "2021 HC1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  112. ↑ "JPL Small-Body Database Browser: (2021 GF10)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  113. ↑ "2021 GF10". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  114. ↑ "JPL Small-Body Database Browser: (2021 GN10)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  115. ↑ "2021 GN10". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  116. ↑ Gray, Bill (23 April 2021). ""Pseudo-MPEC" for ZTF0KyD". Project Pluto. Archived from the original on 23 April 2021. Retrieved 24 April 2021.
  117. ↑ "JPL Small-Body Database Browser: (2021 HE1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  118. ↑ "2021 HE1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  119. ↑ Gray, Bill (18 April 2021). ""Pseudo-MPEC" for P11f7ua". Project Pluto. Archived from the original on 18 April 2021. Retrieved 18 April 2021.
  120. ↑ Gray, Bill (19 April 2021). ""Pseudo-MPEC" for B04SK17". Project Pluto. Archived from the original on 19 April 2021. Retrieved 19 April 2021.
  121. ↑ "JPL Small-Body Database Browser: (2021 HN)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  122. ↑ "2021 HN". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  123. ↑ Gray, Bill (30 April 2021). ""Pseudo-MPEC" for A10wMMp". Project Pluto. Archived from the original on 20 June 2021. Retrieved 20 June 2021.
  124. ↑ Gray, Bill (29 April 2021). ""Pseudo-MPEC" for ZTF0Kzz". Project Pluto. Archived from the original on 20 June 2021. Retrieved 20 June 2021.
  125. ↑ Gray, Bill (7 May 2021). ""Pseudo-MPEC" for S514008". Project Pluto. Archived from the original on 20 June 2021. Retrieved 20 June 2021.
  126. ↑ "JPL Small-Body Database Browser: (2021 JW)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  127. ↑ "2021 JW". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  128. ↑ "JPL Small-Body Database Browser: (2021 JV)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  129. ↑ "2021 JV". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  130. ↑ "JPL Small-Body Database Browser: (2021 JS1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  131. ↑ "2021 JS1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  132. ↑ Gray, Bill (2 June 2021). ""Pseudo-MPEC" for P11gae7". Project Pluto. Archived from the original on 20 June 2021. Retrieved 20 June 2021.
  133. ↑ "JPL Small-Body Database Browser: (2021 JQ2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  134. ↑ "2021 JQ2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  135. ↑ Gray, Bill (17 May 2021). ""Pseudo-MPEC" for P11gae5". Project Pluto. Archived from the original on 20 June 2021. Retrieved 20 June 2021.
  136. ↑ Gray, Bill (17 May 2021). ""Pseudo-MPEC" for P11ggM3". Project Pluto. Archived from the original on 20 June 2021. Retrieved 20 June 2021.
  137. ↑ "JPL Small-Body Database Browser: (2021 JB6)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  138. ↑ "2021 JB6". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  139. ↑ "JPL Small-Body Database Browser: (2021 JU6)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  140. ↑ "2021 JU6". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  141. ↑ "JPL Small-Body Database Browser: (2021 LV)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  142. ↑ "2021 LV". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  143. ↑ "JPL Small-Body Database Browser: (2021 KO2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  144. ↑ "2021 KO2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  145. ↑ Gray, Bill (4 June 2021). ""Pseudo-MPEC" for TMG0049". Project Pluto. Archived from the original on 20 June 2021. Retrieved 20 June 2021.
  146. ↑ "JPL Small-Body Database Browser: (2021 KN2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  147. ↑ "2021 KN2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  148. ↑ "JPL Small-Body Database Browser: (2021 KQ2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  149. ↑ "2021 KQ2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  150. ↑ Gray, Bill (5 June 2021). ""Pseudo-MPEC" for C5Q2Z32". Project Pluto. Archived from the original on 20 June 2021. Retrieved 20 June 2021.
  151. ↑ "JPL Small-Body Database Browser: (2021 KT2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  152. ↑ "2021 KT2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  153. ↑ "JPL Small-Body Database Browser: (2021 LX1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  154. ↑ "2021 LX1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  155. ↑ "JPL Small-Body Database Browser: (2021 LG5)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  156. ↑ "2021 LG5". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  157. ↑ "JPL Small-Body Database Browser: (2021 LO2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  158. ↑ "2021 LO2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  159. ↑ "JPL Small-Body Database Browser: (2021 MU)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  160. ↑ "2021 MU". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  161. ↑ "JPL Small-Body Database Browser: (2021 ME)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  162. ↑ "2021 ME". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  163. ↑ "JPL Small-Body Database Browser: (2021 NA)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  164. ↑ "2021 NA". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  165. ↑ "JPL Small-Body Database Browser: (2021 NU3)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  166. ↑ "2021 NU3". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  167. ↑ "JPL Small-Body Database Browser: (2021 OV)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  168. ↑ "2021 OV". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  169. ↑ "JPL Small-Body Database Browser: (2021 OD1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  170. ↑ "2021 OD1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  171. ↑ "JPL Small-Body Database Browser: (2021 PC)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  172. ↑ "2021 PC". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  173. ↑ "JPL Small-Body Database Browser: (2021 PL132)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  174. ↑ "2021 PL132". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  175. ↑ "JPL Small-Body Database Browser: (2021 PY4)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  176. ↑ "2021 PY4". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  177. ↑ "JPL Small-Body Database Browser: (2021 PK4)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  178. ↑ "2021 PK4". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  179. ↑ "JPL Small-Body Database Browser: (2021 PA17)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  180. ↑ "2021 PA17". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  181. ↑ "JPL Small-Body Database Browser: (2021 QD1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  182. ↑ "2021 QD1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  183. ↑ "JPL Small-Body Database Browser: (2021 QV3)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  184. ↑ "2021 QV3". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  185. ↑ "JPL Small-Body Database Browser: (2021 RN5)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  186. ↑ "2021 RN5". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  187. ↑ "JPL Small-Body Database Browser: (2021 RT4)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  188. ↑ "2021 RT4". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  189. ↑ "JPL Small-Body Database Browser: (2021 RS100)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  190. ↑ "2021 RS100". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  191. ↑ "JPL Small-Body Database Browser: (2021 RS2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  192. ↑ "2021 RS2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  193. ↑ "JPL Small-Body Database Browser: (2021 RP2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  194. ↑ "2021 RP2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  195. ↑ "JPL Small-Body Database Browser: (2021 RS5)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  196. ↑ "2021 RS5". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  197. ↑ "JPL Small-Body Database Browser: (2021 RQ2)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  198. ↑ "2021 RQ2". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  199. ↑ "JPL Small-Body Database Browser: (2021 RB6)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  200. ↑ "2021 RB6". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  201. ↑ "JPL Small-Body Database Browser: (2021 RG6)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  202. ↑ "2021 RG6". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  203. ↑ "JPL Small-Body Database Browser: (2021 RG12)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  204. ↑ "2021 RG12". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  205. ↑ "JPL Small-Body Database Browser: (2021 RR5)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  206. ↑ "2021 RR5". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  207. ↑ "JPL Small-Body Database Browser: (2021 RF16)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  208. ↑ "2021 RF16". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  209. ↑ "JPL Small-Body Database Browser: (2021 SG)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  210. ↑ "2021 SG". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  211. ↑ "JPL Small-Body Database Browser: (2021 SP)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  212. ↑ "2021 SP". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  213. ↑ "JPL Small-Body Database Browser: (2021 SQ)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  214. ↑ "2021 SQ". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  215. ↑ "JPL Small-Body Database Browser: (2021 SW1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  216. ↑ "2021 SW1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  217. ↑ "JPL Small-Body Database Browser: (2021 SQ1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  218. ↑ "2021 SQ1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  219. ↑ "JPL Small-Body Database Browser: (2021 TT)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  220. ↑ "2021 TT". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  221. ↑ "JPL Small-Body Database Browser: (2021 TX)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  222. ↑ "2021 TX". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  223. ↑ "JPL Small-Body Database Browser: (2021 TV1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  224. ↑ "2021 TV1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  225. ↑ "JPL Small-Body Database Browser: (2021 TG1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  226. ↑ "2021 TG1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  227. ↑ "JPL Small-Body Database Browser: (2021 TQ4)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  228. ↑ "2021 TQ4". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  229. ↑ "JPL Small-Body Database Browser: (2021 TT1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  230. ↑ "2021 TT1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  231. ↑ "JPL Small-Body Database Browser: (2021 TK11)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  232. ↑ "2021 TK11". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  233. ↑ "JPL Small-Body Database Browser: (2021 TT13)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  234. ↑ "2021 TT13". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  235. ↑ "JPL Small-Body Database Browser: (2021 TH15)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  236. ↑ "2021 TH15". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  237. ↑ "JPL Small-Body Database Browser: (2021 TE13)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  238. ↑ "2021 TE13". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  239. ↑ "JPL Small-Body Database Browser: (2021 TM14)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  240. ↑ "2021 TM14". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  241. ↑ "JPL Small-Body Database Browser: (2021 UL)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  242. ↑ "2021 UL". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  243. ↑ "JPL Small-Body Database Browser: (2021 TJ15)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  244. ↑ "2021 TJ15". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  245. ↑ "JPL Small-Body Database Browser: (2021 TG14)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  246. ↑ "2021 TG14". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  247. ↑ "JPL Small-Body Database Browser: (2021 UT)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  248. ↑ "2021 UT". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  249. ↑ "JPL Small-Body Database Browser: (2021 UO1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  250. ↑ "2021 UO1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  251. ↑ "JPL Small-Body Database Browser: (2021 UA1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  252. ↑ "2021 UA1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  253. ↑ "2021 UA7". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  254. ↑ "JPL Small-Body Database Browser: (2021 UH1)". Jet Propulsion Laboratory. Retrieved 30 October 2021.
  255. ↑ "2021 UH1". Minor Planet Center. International Astronomical Union. Retrieved 30 October 2021.
  256. ↑ "JPL Small-Body Database Browser: (2021 UV5)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  257. ↑ "2021 UV5". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  258. ↑ "JPL Small-Body Database Browser: (2021 UT5)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  259. ↑ "2021 UT5". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  260. ↑ "JPL Small-Body Database Browser: (2021 UF12)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  261. ↑ "2021 UF12". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  262. ↑ "JPL Small-Body Database Browser: (2021 UW1)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  263. ↑ "2021 UW1". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  264. ↑ "JPL Small-Body Database Browser: (2021 UJ6)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  265. ↑ "2021 UJ6". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  266. ↑ "JPL Small-Body Database Browser: (2021 VH)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  267. ↑ "2021 VH". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  268. ↑ "JPL Small-Body Database Browser: (2021 UO7)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  269. ↑ "2021 UO7". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  270. ↑ "JPL Small-Body Database Browser: (2021 VS11)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  271. ↑ "2021 VS11". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  272. ↑ "JPL Small-Body Database Browser: (2021 VK3)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  273. ↑ "2021 VK3". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  274. ↑ "JPL Small-Body Database Browser: (2021 VL3)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  275. ↑ "2021 VL3". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  276. ↑ "JPL Small-Body Database Browser: (2021 VN3)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  277. ↑ "2021 VN3". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  278. ↑ "JPL Small-Body Database Browser: (2021 VM3)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  279. ↑ "2021 VM3". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  280. ↑ "JPL Small-Body Database Browser: (2021 VD8)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  281. ↑ "2021 VD8". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  282. ↑ "JPL Small-Body Database Browser: (2021 VP11)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  283. ↑ "2021 VP11". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  284. ↑ "JPL Small-Body Database Browser: (2021 VU4)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  285. ↑ "2021 VU4". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  286. ↑ "JPL Small-Body Database Browser: (2021 VY7)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  287. ↑ "2021 VY7". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  288. ↑ "JPL Small-Body Database Browser: (2021 VC7)". Jet Propulsion Laboratory. Retrieved 11 November 2021.
  289. ↑ "2021 VC7". Minor Planet Center. International Astronomical Union. Retrieved 11 November 2021.
  290. ↑ "JPL Small-Body Database Browser: (2021 WP)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  291. ↑ "2021 WP". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  292. ↑ "JPL Small-Body Database Browser: (2021 WA1)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  293. ↑ "2021 WA1". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  294. ↑ "JPL Small-Body Database Browser: (2021 WC1)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  295. ↑ "2021 WC1". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  296. ↑ "JPL Small-Body Database Browser: (2021 XV)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  297. ↑ "2021 XV". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  298. ↑ "JPL Small-Body Database Browser: (2021 WF3)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  299. ↑ "2021 WF3". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  300. ↑ "JPL Small-Body Database Browser: (2021 XL)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  301. ↑ "2021 XL". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  302. ↑ "JPL Small-Body Database Browser: (2021 XF1)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  303. ↑ "2021 XF1". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  304. ↑ "JPL Small-Body Database Browser: (2021 XC2)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  305. ↑ "2021 XC2". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  306. ↑ "JPL Small-Body Database Browser: (2021 XZ5)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  307. ↑ "2021 XZ5". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  308. ↑ "JPL Small-Body Database Browser: (2021 XU5)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  309. ↑ "2021 XU5". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  310. ↑ "JPL Small-Body Database Browser: (2021 XV4)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  311. ↑ "2021 XV4". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  312. ↑ "JPL Small-Body Database Browser: (2021 XX4)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  313. ↑ "2021 XX4". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  314. ↑ "JPL Small-Body Database Browser: (2021 XC6)". Jet Propulsion Laboratory. Retrieved 3 January 2022.
  315. ↑ "2021 XC6". Minor Planet Center. International Astronomical Union. Retrieved 3 January 2022.
  316. ↑ Benner, Lance A. M. "Goldstone Radar Observations Planning: 2021 LD1". Asteroid Radar Research. Jet Propulsion Laboratory. Retrieved 23 July 2021.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.