(153814) 2001 WN5

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(153814) 2001 WN5
Discovery [1]
Discovered by LONEOS
Discovery site Anderson Mesa Stn.
Discovery date 20 November 2001
Designations
MPC designation (153814) 2001 WN5
2001 WN5
NEO · PHA · Apollo[1]
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.

Description[edit]

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,[3] The potentially hazardous asteroid was removed from the Sentry Risk Table on January 30, 2002.[4]

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

The asteroid will pass within 250,000 km (0.65 lunar distances) from the Earth on June 26, 2028.[5] 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]

References[edit]

  1. ^ a b c d e f g "JPL Small-Body Database Browser: 153814 (2001 WN5)" (2017-12-26 last obs.). Jet Propulsion Laboratory. Retrieved 13 January 2018. 
  2. ^ a b c 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:1109.6400Freely accessible. Bibcode:2011ApJ...743..156M. doi:10.1088/0004-637X/743/2/156. Retrieved 13 January 2018. 
  3. ^ "153814 (2001 WN5)". Minor Planet Center. Retrieved 13 January 2018. 
  4. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2011-10-16. 
  5. ^ "JPL Close-Approach Data: 153814 (2001 WN5)" (2011-01-04 last obs and observation arc=14.9 years). Retrieved 2011-10-16. 
  6. ^ "2001WN5 Ephemerides for 26 Jun 2028". NEODyS (Near Earth Objects - Dynamic Site). Retrieved 2011-10-16. 

External links[edit]

Preceded by
367943 Duende (2012 DA14)
Large NEO Earth close approach
(inside the orbit of the Moon)

26 June 2028
Succeeded by
99942 Apophis