(153814) 2001 WN5

Last updated

(153814) 2001 WN5
Discovery [1]
Discovered by LONEOS
Discovery site Anderson Mesa Stn.
Discovery date20 November 2001
Designations
(153814) 2001 WN5
2001 WN5
Orbital characteristics [1]
Epoch 4 September 2017 (JD  2458000.5)
Uncertainty parameter 0
Observation arc 21.88 yr (7,990 days)
Aphelion 2.5114  AU
Perihelion 0.9125 AU
1.7119 AU
Eccentricity 0.4670
2.24  yr (818 days)
46.227°
0° 26m 24s / day
Inclination 1.9197°
277.51°
44.569°
Earth  MOID 0.0015 AU (0.6  LD)
Physical characteristics
Mean diameter
0.932±0.011 km [2]
0.097±0.016 [2]
18.3 [1]

    (153814) 2001 WN5 is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group.

    Contents

    2028 Earth/Moon approach [1]
    Date & TimeApproach
    to    		 Nominal distanceuncertainty
    region
    (3-sigma)
    2028-Jun-26 05:23Earth248714 km± 25 km [3]
    2028-Jun-26 07:43Moon502854 km± 26 km

    Description

    Nominal orbit of 2001 WN5 (green line) passing the Earth-Moon system in June 2028 2001WN5topdown.png
    Nominal orbit of 2001 WN5 (green line) passing the Earth–Moon system in June 2028

    It was discovered by the Lowell Observatory Near-Earth-Object Search at Anderson Mesa Station on 20 November 2001, [4] The potentially hazardous asteroid was removed from the Sentry Risk Table on 30 January 2002. [5]

    There are precovery images dating back to 10 February 1996. [1] The orbit is well determined with an observation arc of 14.9 years which includes two radar delay observations. It has an Uncertainty Parameter of 0. [1]

    The asteroid will pass 248,700 km (0.647 LD) from the Earth on 26 June 2028. [1] During the close approach, the asteroid should peak at about apparent magnitude 6.7, [6] and will be visible in binoculars. It has an absolute magnitude (H) of 18.2. [1]

    According to observations by the NEOWISE mission, the asteroid measures approximately 0.9 km in diameter and its surface has a rather low albedo of 0.097. [2]

    History of close approaches of large near-Earth objects since 1908 (A)
    PHA DateApproach distance in lunar distances Abs. mag
    ( H )    		Diameter (C)
    (m)    		Ref (D)
    Nominal(B)MinimumMaximum
    (152680) 1998 KJ9 1914-12-310.6060.6040.60819.4279–900 data
    (458732) 2011 MD5 1918-09-170.9110.9090.91317.9556–1795 data
    (163132) 2002 CU11 1925-08-300.9030.9010.90518.5443–477 data
    69230 Hermes 1937-10-301.9261.9261.92717.5700-900 [7] data
    69230 Hermes1942-04-261.6511.6511.65117.5700-900 [7] data
    2017 NM6 1959-07-121.891.8461.93418.8580–1300 data
    (27002) 1998 DV9 1975-01-311.7621.7611.76218.1507–1637 data
    2002 NY40 2002-08-181.3711.3711.37119.0335–1082 data
    2004 XP14 2006-07-031.1251.1251.12519.3292–942 data
    2015 TB145 2015-10-311.2661.2661.26620.0620-690 data
    (137108) 1999 AN10 2027-08-071.0141.0101.01917.9556–1793 data
    (153814) 2001 WN5 2028-06-260.6470.6470.64718.2921–943 data
    99942 Apophis 2029-04-130.09810.09630.100019.7310–340 data
    2017 MB1 2072-07-261.2161.2152.75918.8367–1186 data
    2011 SM68 2072-10-171.8751.8651.88619.6254–820 data
    (163132) 2002 CU112080-08-311.6551.6541.65618.5443–477 data
    (416801) 1998 MZ 2116-11-261.0681.0681.06919.2305–986 data
    (153201) 2000 WO107 2140-12-010.6340.6310.63719.3427–593 data
    (276033) 2002 AJ129 2172-02-081.7831.7751.79218.7385–1242 data
    (290772) 2005 VC 2198-05-051.9511.7912.13417.6638–2061 data
    (A) This list includes near-Earth approaches of less than 2 lunar distances (LD) of objects with H brighter than 20.
    (B) Nominal geocentric distance from the center of Earth to the center of the object (Earth has a radius of approximately 6,400 km).
    (C) Diameter: estimated, theoretical mean-diameter based on H and albedo range between X and Y.
    (D) Reference: data source from the JPL SBDB, with AU converted into LD (1 AU≈390 LD)
    (E) Color codes:   unobserved at close approach  observed during close approach  upcoming approaches

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    References

    1. 1 2 3 4 5 6 7 8 9 "JPL Small-Body Database Browser: 153814 (2001 WN5)" (2017-12-26 last obs.). Jet Propulsion Laboratory . Retrieved 13 January 2018.
    2. 1 2 3 Mainzer, A.; Grav, T.; Bauer, J.; Masiero, J.; McMillan, R. S.; Cutri, R. M.; et al. (December 2011). "NEOWISE Observations of Near-Earth Objects: Preliminary Results". The Astrophysical Journal. 743 (2): 17. arXiv: 1109.6400 . Bibcode:2011ApJ...743..156M. doi:10.1088/0004-637X/743/2/156. S2CID   239991 . Retrieved 13 January 2018.
    3. ↑ "Horizons Batch for 2028-Jun-26 05:23 UT". JPL Horizons. Archived from the original on 24 January 2022. Retrieved 24 January 2021.
    4. ↑ "153814 (2001 WN5)". Minor Planet Center. Retrieved 13 January 2018.
    5. ↑ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Archived from the original on 2 June 2002. Retrieved 16 October 2011.
    6. ↑ "2001WN5 Ephemerides for 26 Jun 2028". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 16 October 2011.
    7. 1 2 Marchis, F.; et al. "Multiple asteroid systems: Dimensions and thermal properties from Spitzer Space Telescope and ground-based observations". Icarus. 221 (2): 1130–1161. Bibcode:2012Icar..221.1130M. doi:10.1016/j.icarus.2012.09.013 . Retrieved 24 August 2018.
    Preceded by
    367943 Duende (2012 DA14)
    		 Large NEO Earth close approach
    (inside the orbit of the Moon)
    26 June 2028    		Succeeded by
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