List of asteroid close approaches to Earth in 2014

Last updated

Time of discovery of asteroids which came closer to Earth than the Moon in 2014
Circle frame.svgAfter closest approach: 18 (56.2%)< 24 hours before: 5 (15.6%)up to 7 days before: 8 (25.0%)> one week before: 1 (3.1%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)
  •   After closest approach: 18 (56.2%)
  •   < 24 hours before: 5 (15.6%)
  •   up to 7 days before: 8 (25.0%)
  •   > one week before: 1 (3.1%)
  •   > 7 weeks before: 0 (0.0%)
  •   > one year before: 0 (0.0%)
Other Years
2012, 2013, 2014, 2015, 2016

Below is the list of asteroid close approaches to Earth in 2014.

Contents

Timeline of known close approaches less than one lunar distance from Earth in 2014

A list of known near-Earth asteroid close approaches less than 1 lunar distance (384,400 km or 0.00257 AU) from Earth in 2014. [note 1]

For reference, the radius of Earth is approximately 0.0000426 AU (6,370 km; 3,960 mi) or 0.0166 Lunar distances.
The orbit of geosynchronous satellites, however, is 0.000282 AU (42,200 km; 26,200 mi) or 0.110 Lunar distances. This year, 3 asteroids were detected which traveled nearer than this, most notably 2014 AA, which impacted. This list does not include any of the other 32 objects that collided with earth in 2014, none of which were discovered in advance, but were recorded by sensors designed to detect detonation of nuclear devices (of the 33 objects detected 5 had an impact energy greater than that of a 1 kiloton device). [1]

  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		Date
discovered		 Object Nominal geocentric
distance (AU) [note 2] 		Nominal geocentric
distance (LD)		Size (m)
(approx.)		(H)
(abs. mag)		Closer
approach
to Moon 		Refs [2] [3]
2014-01-012014-01-02 2014 AF5 0.00064  AU (96,000  km ; 59,000  mi )0.255–1028.8 [4] Yes data  · 2014 AF5
2014-01-022014-01-01 2014 AA 0.000003 AU (450 km; 280 mi)(Impact) [5] [6] 0.001 (Impact)2–430.9 data  · 2014 AA
2014-01-082014-01-102014 AK510.00247 AU (370,000 km; 230,000 mi)0.9615–3026.6 [7] Yes data  · 2014 AK51
2014-01-092014-01-102014 AG510.000877 AU (131,200 km; 81,500 mi)0.342–529.9 [8] data  · 2014 AG51
2014-01-102014-01-102014 AW320.00124 AU (186,000 km; 115,000 mi)0.4810–2027.2 [9] data  · 2014 AW32
2014-02-212014-02-222014 DK100.00173 AU (259,000 km; 161,000 mi)0.677–1627.8 [10] data  · 2014 DK10
2014-03-052014-02-28 2014 DX110 0.00233 AU (349,000 km; 217,000 mi)0.9120–4025.7 [11] data  · 2014 DX110
2014-03-062014-03-052014 EF0.00113 AU (169,000 km; 105,000 mi)0.444–929.0 [12] data  · 2014 EF
2014-03-062014-03-05 2014 EC 0.000412 AU (61,600 km; 38,300 mi)0.166–1428.2 [13] data  · 2014 EC
2014-03-092014-03-112014 EX240.00175 AU (262,000 km; 163,000 mi)0.685–1128.7 [14] Yes data  · 2014 EX24
2014-03-302014-04-042014 GY440.00111 AU (166,000 km; 103,000 mi)0.4320–5025.4 [15] Yes data  · 2014 GY44
2014-04-032014-04-042014 GC490.000759 AU (113,500 km; 70,600 mi)0.305–1128.6 [16] data  · 2014 GC49
2014-05-032014-04-282014 HL1290.00195 AU (292,000 km; 181,000 mi)0.766–1428.0 [17] data  · 2014 HL129
2014-05-072014-05-062014 JR240.000714 AU (106,800 km; 66,400 mi)0.283–829.3 [18] data  · 2014 JR24
2014-05-102014-05-102014 JG550.000676 AU (101,100 km; 62,800 mi)0.263–829.2 [19] data  · 2014 JG55
2014-05-262014-05-282014 KW760.00230 AU (344,000 km; 214,000 mi)0.896–1428.0 [20] data  · 2014 KW76
2014-05-282014-05-272014 KC450.000590 AU (88,300 km; 54,800 mi)0.233–829.4 [21] data  · 2014 KC45
2014-06-032014-06-052014 LN170.00143 AU (214,000 km; 133,000 mi)0.5410–2027.2 [22] data  · 2014 LN17
2014-06-032014-06-02 2014 LY21 0.000111 AU (16,600 km; 10,300 mi)0.0434–829.1 [23] ? data  · 2014 LY21
2014-06-222014-06-242014 MH60.00165 AU (247,000 km; 153,000 mi)0.6410–2327.0 [24] Yes data  · 2014 MH6
2014-07-242014-07-252014 OP20.00134 AU (200,000 km; 125,000 mi)0.524–929.0 [25] data  · 2014 OP2
2014-07-252014-07-262014 OM2070.00180 AU (269,000 km; 167,000 mi)0.704–929.0 [26] data  · 2014 OM207
2014-08-312014-09-012014 RA0.000379 AU (56,700 km; 35,200 mi)0.155–1028.8 [27] data  · 2014 RA
2014-09-072014-09-01 2014 RC 0.000267 AU (39,900 km; 24,800 mi)0.1011–2526.8 [28] data  · 2014 RC
2014-09-202014-09-202014 SG10.000532 AU (79,600 km; 49,500 mi)0.214–929.0 [29] data  · 2014 SG1
2014-10-012014-10-022014 TL0.000656 AU (98,100 km; 61,000 mi)0.268–1727.6 [30] data  · 2014 TL
2014-10-192014-10-242014 UU560.00174 AU (260,000 km; 162,000 mi)0.667–1528.0 [31] data  · 2014 UU56
2014-10-272014-10-252014 UF560.00110 AU (165,000 km; 102,000 mi)0.438–1927.4 [32] data  · 2014 UF56
2014-11-132014-11-172014 WE60.00147 AU (220,000 km; 137,000 mi)0.572–530.3 [33] Yes data  · 2014 WE6
2014-11-152014-11-172014 WJ60.00223 AU (334,000 km; 207,000 mi)0.869–2327.1 [34] Yes data  · 2014 WJ6
2014-12-072014-11-242014 WX2020.00251 AU (375,000 km; 233,000 mi)0.983–729.4 [35] Yes data  · 2014 WX202
2014-12-262014-12-272014 YR140.00233 AU (349,000 km; 217,000 mi)0.9116–3526.1 [36] data  · 2014 YR14

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. 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.

Abs 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: 1 (50.0%)< 24 hours before: 1 (50.0%)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%)

Abs Magnitude 29-30

Circle frame.svgAfter closest approach: 3 (30.0%)< 24 hours before: 3 (30.0%)up to 7 days before: 3 (30.0%)> one week before: 1 (10.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute Magnitude 28-29

Circle frame.svgAfter closest approach: 6 (75.0%)< 24 hours before: 0 (0.0%)up to 7 days before: 2 (25.0%)> 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: 5 (71.4%)< 24 hours before: 1 (14.3%)up to 7 days before: 1 (14.3%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute Magnitude 26-27

Circle frame.svgAfter closest approach: 2 (66.7%)< 24 hours before: 0 (0.0%)up to 7 days before: 1 (33.3%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute Magnitude 25-26

Circle frame.svgAfter closest approach: 1 (50.0%)< 24 hours before: 0 (0.0%)up to 7 days before: 1 (50.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Notes

  1. ↑ For a list of current Earth close approaches see NEO Earth Close Approaches
  2. ↑ 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.

Timeline of close approaches less than one Lunar distance from the Moon in 2014

The number of asteroids listed here are significantly less than those of asteroids approaching Earth for several reasons:

These factors combined severely limit the amount of Moon-approaching asteroids, to a level many times lower than the detected asteroids to pass just as close to Earth instead.

Date of
closest
approach		Object Nominal lunocentric
distance (AU) [note2 1] 		Nominal lunocentric
distance (LD)		Size (m)
(approximate)		(H)
approach
distance
to Earth
(LD)
2014-01-01 2014 AF5 0.000625 AU (93,500 km; 58,100 mi)0.244–1228.8 [4] 0.25
2014-01-02 2014 AA 0.00238 AU (356,000 km; 221,000 mi)0.93 [note2 2] 1–530.9 [37] impact
2014-01-072014 AK510.00142 AU (212,000 km; 132,000 mi)0.5510–3326.6 [7] 0.96
2014-01-082014 AD160.00244 AU (365,000 km; 227,000 mi)0.957–2327.4 [38] 1.50
2014-01-092014 AG510.00238 AU (356,000 km; 221,000 mi)0.932–729.9 [8] 0.34
2014-01-102014 AW320.00218 AU (326,000 km; 203,000 mi)0.857–2227.5 [9] 0.48
2014-03-05 2014 DX110 0.00250 AU (374,000 km; 232,000 mi)0.9715–4925.7 [11] 0.91
2014-03-06 2014 EC 0.00257 AU (384,000 km; 239,000 mi)0.99925–1628.2 [13] 0.16
2014-03-092014 EX240.00164 AU (245,000 km; 152,000 mi)0.644–1328.6 [14] 0.68
2014-03-172014 FE0.00232 AU (347,000 km; 216,000 mi)0.907–2427.3 [39] 1.10
2014-03-292014 GY440.000250 AU (37,400 km; 23,200 mi)0.09718–5725.4 [15] 0.43
2014-05-102014 JG550.00216 AU (323,000 km; 201,000 mi)0.843–1029.2 [19] 0.26
2014-05-282014 KC450.00171 AU (256,000 km; 159,000 mi)0.673–929.3 [21] 0.23
2014-06-032014 LN170.00201 AU (301,000 km; 187,000 mi)0.788–2727.0 [22] 0.54
2014-06-042014 LY210.00108 AU (162,000 km; 100,000 mi)0.423–1029.1 [23] 0.043
2014-06-222014 MH60.000956 AU (143,000 km; 88,900 mi)0.378–2627.1 [24] 0.64
2014-08-312014 RA0.00203 AU (304,000 km; 189,000 mi)0.794–1128.9 [27] 0.15
2014-09-07 2014 RC 0.000845 AU (126,400 km; 78,500 mi)0.339–3026.8 [28] 0.10
2014-09-202014 SG10.00205 AU (307,000 km; 191,000 mi)0.803–1029.1 [29] 0.21
2014-10-012014 TL0.00191 AU (286,000 km; 178,000 mi)0.746–1927.8 [30] 0.26
2014-10-272014 UF560.00137 AU (205,000 km; 127,000 mi)0.537–2327.4 [32] 0.43
2014-11-132014 WE60.00122 AU (183,000 km; 113,000 mi)0.482–630.4 [33] 0.57
2014-11-152014 WJ60.00181 AU (271,000 km; 168,000 mi)0.708–2627.1 [34] 0.86
2014-12-042014 WX2020.00148 AU (221,000 km; 138,000 mi)0.583–829.6 [35] 0.98

Notes

  1. ↑ Distance from the center of the Moon to the center of the object. the Moon has a radius of approximately 1,740 km.
  2. ↑ if 2014 AA had not hit Earth, it would have traveled much closer to the Moon

Additional examples

Radar-imaging of 2006 DP14, which passed by Earth in early February 2014 at a distance of 6.25 LD Asteroid2006DP14.jpg
Radar-imaging of 2006 DP14, which passed by Earth in early February 2014 at a distance of 6.25 LD

An example list of near-Earth asteroids that passed more than 1 lunar distance (384,400 km or 0.00256 AU) from Earth in 2014.

See also

Related Research Articles

<span class="nowrap">2010 GA<sub>6</sub></span>

2010 GA6 is a micro-asteroid on an eccentric orbit, classified as a near-Earth object of the Apollo group. It was first observed on 5 April 2010, by astronomers of the Catalina Sky Survey at Mount Lemmon Observatory, Arizona, United States, four days before a close approach to Earth at 1.1 lunar distances on 9 April 2010. It has not been observed since.

2009 RR micro-asteroid, classified as near-Earth object of the Apollo group. It was discovered on 11 September 2009 by the Catalina Sky Survey at an apparent magnitude of 19.5 using a 0.68-meter (27 in) Schmidt–Cassegrain telescope. 2009 RR was the only asteroid discovered before 2014 that was predicted to potentially pass inside the orbit of the Moon during 2014. The asteroid has an estimated diameter of 26 meters (85 ft) and is listed on the Sentry Risk Table. It is not large enough to qualify as a potentially hazardous object.

2014 AF5 (also written 2014 AF5) is an Apollo near-Earth asteroid roughly 5–10 meters in diameter that passed less than 1 lunar distance from Earth on 1 January 2014.

2011 XC2 (also written 2011 XC2) is a near-Earth asteroid roughly 60–140 meters (200–460 ft) in diameter that passed less than 1 lunar distance from Earth on 3 December 2011.

2014 DX110 is a sub-kilometer asteroid, classified as near-Earth object of the Apollo group, approximately 30 meters in diameter. It passed less than 1 lunar distance from Earth on 5 March 2014. With an absolute magnitude of 25.7, this asteroid is potentially the largest asteroid to come inside the orbit of the Moon since 2013 PJ10 on 4 August 2013. The close approach was webcast live by Slooh and Virtual Telescope.

2014 EC is a 10-meter sized, eccentric asteroid, classified as near-Earth object of the Apollo group that passed within 48,000 miles (77,000 km) of Earth in early March 2014. This was six times closer to the Earth than the Moon. It was first observed on 5 March 2014, by the Catalina Sky Survey at Mount Lemmon Observatory in Arizona, United States. As of 2017, it has not since been observed.

2015 BP513 (also written 2015 BP513) is an Apollo near-Earth asteroid roughly 12–27 meters in diameter that passed less than 1 lunar distance from Earth on 18 January 2015.

<span class="nowrap">2015 TB<sub>145</sub></span> Potentially hazardous near-Earth asteroid

2015 TB145 is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 650 meters (2,000 feet) in diameter. It safely passed 1.27 lunar distances from Earth on 31 October 2015 at 17:01 UTC, and passed by Earth again in November 2018.

<span class="nowrap">2018 CN<sub>2</sub></span>

2018 CN2 is a very small asteroid, classified as a near-Earth object of the Apollo group, approximately 5 to 16 meters in diameter. It was first observed by astronomers of the Mount Lemmon Survey at Mount Lemmon Observatory, Arizona, on 8 February 2018, one day prior its close encounter with Earth at 0.18 lunar distances.

<span class="mw-page-title-main">2018 CC</span>

2018 CC is a micro-asteroid, classified as a near-Earth object of the Apollo group, approximately 20 meters (70 ft) in diameter. Its official first observation was made by the Catalina Sky Survey at Mount Lemmon Observatory, Arizona, United States, on 4 February 2018. Two days later, the asteroid crossed the orbit of the Moon and made a very close approach to Earth.

<span class="nowrap">2018 DV<sub>1</sub></span>

2018 DV1 is a micro-asteroid, classified as a near-Earth object of the Aten group, approximately 6–12 meters (20–40 feet) in diameter. It was first observed on 26 February 2018, by astronomers of the Mount Lemmon Survey at Mount Lemmon Observatory, Arizona, five days prior to its sub-lunar close encounter with Earth at less than 0.3 lunar distance.

<span class="nowrap">2018 GE<sub>3</sub></span>

2018 GE3 is a sub-kilometer asteroid on a highly eccentric orbit, classified as a near-Earth object of the Apollo group, approximately 48–110 meters (160–360 feet) in diameter. It was first observed on 14 April 2018, by astronomers with the Catalina Sky Survey one day prior to its sub-lunar close encounter with Earth at 0.5 lunar distance. It is one of the largest known asteroids (possibly the largest) in observational history to ever pass that close to Earth (also see list).

<span class="nowrap">2019 BZ<sub>3</sub></span>

2019 BZ3 is a very small near-Earth asteroid of the Apollo group, approximately 6 meters (20 feet) in diameter. It was first observed by the Mount Lemmon Survey on 28 January 2019, just hours after the asteroid's sub-lunar flyby of Earth at less than 0.12 lunar distance.

<span class="mw-page-title-main">2020 LD</span> Near-Earth asteroid

2020 LD is an Apollo near-Earth asteroid roughly 140 meters in diameter. It was discovered on 7 June 2020 when the asteroid was about 0.03 AU from Earth and had a solar elongation of 154 degrees. The glare of the Sun had masked the approach of the asteroid since November 2019. The asteroid passed closest approach to Earth on 5 June 2020 at a distance of 0.002 AU. The close approach distance is now known with an accuracy of roughly ± 1000 km. This is the largest asteroid to pass closer than the Moon this year and possibly the largest since (308635) 2005 YU55 in November 2011. The asteroid makes close approaches to Mercury, Venus, Earth, and Mars. It will be brighter than apparent magnitude 24 until 18 July 2020.

References

  1. ↑ "Fireballs".
  2. ↑ "JPL Small-Body Database Browser". JPL Solar System Dynamics. NASA Jet Propulsion Laboratory.
  3. ↑ "MPC Database". IAU Minor Planet Center. International Astronomical Union. Retrieved 1 January 2021.
  4. 1 2 "JPL Small-Body Database Browser: (2014 AF5)" (last observation: 2014-01-03). Retrieved 2014-01-06.
  5. ↑ Farnocchia, Davide; Chesley, Steven R.; Brown, Peter G.; Chodas, Paul W. (1 August 2016). "The trajectory and atmospheric impact of asteroid 2014 AA". Icarus . 274: 327–333. Bibcode:2016Icar..274..327F. doi:10.1016/j.icarus.2016.02.056.
  6. ↑ de la Fuente Marcos, C.; de la Fuente Marcos, R.; Mialle, P. (13 October 2016). "Homing in for New Year: impact parameters and pre-impact orbital evolution of meteoroid 2014 AA". Astrophysics and Space Science . 361 (11): 358 (33 pp.). arXiv: 1610.01055 . Bibcode:2016Ap&SS.361..358D. doi:10.1007/s10509-016-2945-3.
  7. 1 2 "JPL Small-Body Database Browser: (2014 AK51)" (last observation: 2014-01-13).
  8. 1 2 "JPL Small-Body Database Browser: (2014 AG51)" (last observation: 2014-01-11).
  9. 1 2 "JPL Small-Body Database Browser: (2014 AW32)" (last observation: 2014-01-11).
  10. ↑ "JPL Small-Body Database Browser: (2014 DK10)" (last observation: 2014-02-24).
  11. 1 2 "JPL Small-Body Database Browser: (2014 DX110)" (last observation: 2014-03-05).
  12. ↑ "JPL Small-Body Database Browser: (2014 EF)" (last observation: 2014-03-05).
  13. 1 2 "JPL Small-Body Database Browser: (2014 EC)" (last observation: 2014-03-05).
  14. 1 2 "JPL Small-Body Database Browser: (2014 EX24)" (last observation: 2014-03-12).
  15. 1 2 "JPL Small-Body Database Browser: (2014 GY44)" (last observation: 2014-04-09).
  16. ↑ "JPL Small-Body Database Browser: (2014 GC49)" (last observation: 2014-04-05).
  17. ↑ "JPL Small-Body Database Browser: (2014 HL129)" (last observation: 2014-04-29).
  18. ↑ "JPL Small-Body Database Browser: (2014 JR24)" (last observation: 2014-05-07).
  19. 1 2 "JPL Small-Body Database Browser: (2014 JG55)" (last observation: 2014-05-10).
  20. ↑ "JPL Small-Body Database Browser: (2014 KW76)" (last observation: 2014-05-30).
  21. 1 2 "JPL Small-Body Database Browser: (2014 KC45)" (last observation: 2014-05-28).
  22. 1 2 "JPL Small-Body Database Browser: (2014 LN17)" (last observation: 2014-06-07).
  23. 1 2 "JPL Small-Body Database Browser: (2014 LY21)" (last observation: 2014-06-02).
  24. 1 2 "JPL Small-Body Database Browser: (2014 MH6)" (last observation: 2014-06-25).
  25. ↑ "JPL Small-Body Database Browser: (2014 OP2)" (last observation: 2014-06-28).
  26. ↑ "JPL Small-Body Database Browser: (2014 OM207)" (last observation: 2014-06-29).
  27. 1 2 "JPL Small-Body Database Browser: (2014 RA)" (last observation: 2014-09-02).
  28. 1 2 "JPL Small-Body Database Browser: (2014 RC)" (last observation: 2014-09-07).
  29. 1 2 "JPL Small-Body Database Browser: (2014 SG1)" (last observation: 2014-09-20).
  30. 1 2 "JPL Small-Body Database Browser: (2014 TL)" (last observation: 2014-10-02).
  31. ↑ "JPL Small-Body Database Browser: (2014 UU56)" (last observation: 2014-10-26).
  32. 1 2 "JPL Small-Body Database Browser: (2014 UF56)" (last observation: 2014-10-26).
  33. 1 2 "JPL Small-Body Database Browser: (2014 WE6)" (last observation: 2014-11-21).
  34. 1 2 "JPL Small-Body Database Browser: (2014 WJ6)" (last observation: 2014-11-19).
  35. 1 2 "JPL Small-Body Database Browser: (2014 WX202)" (last observation: 2014-11-26).
  36. ↑ "JPL Small-Body Database Browser: (2014 YR14)" (last observation: 2014-12-27).
  37. ↑ "JPL Small-Body Database Browser: (2014 AA)" (last observation: 2014-01-02).
  38. ↑ "JPL Small-Body Database Browser: (2014 AD16)" (last observation: 2014-01-06).
  39. ↑ "JPL Small-Body Database Browser: (2014 FE)" (last observation: 2014-03-24).
  40. ↑ B. King - Asteroid 2014 KH39 Zips Just 1.1 LD from Earth - Universe Today
  41. ↑ "JPL Small-Body Database Browser: (2009 RR)" (last observation: 2009-09-15; arc: 4 days).
  42. ↑ "JPL Small-Body Database Browser: (2014 SN142)" (last observation: 2014-09-22).
  43. ↑ "JPL Small-Body Database Browser: (2014 SC324)" (last observation: 2014-10-24).
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