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(529366) 2009 WM1
Discovery [1] [2]
Discovered by CSS
Discovery site Catalina Stn.
Discovery date17 November 2009
Designations
(529366) 2009 WM1
2009 WM1
Orbital characteristics [3]
Epoch 27 April 2019 ( JD 2458600.5)
Uncertainty parameter 0
Observation arc8.99  yr (3,283 d)
Aphelion1.3798  AU
Perihelion0.9810 AU
1.1804 AU
Eccentricity0.1689
1.28 yr (468 d)
144.70 °
0° 46m 6.6s / day
Inclination25.768°
240.27°
162.62°
Earth  MOID0.0001 AU (0.039  LD)
Physical characteristics
Mean diameter
280  m (est.) [4]
Mass2.9×1010  kg [4]
20.4 [1] [3]

(529366) 2009 WM1, provisional designation 2009 WM1, is a sub-kilometer asteroid and near-Earth object of the Apollo group, approximately 280 meters (920 feet) in diameter. [4] After its discovery by the Catalina Sky Survey at the Catalina Station in Arizona, United States, this potentially hazardous asteroid was briefly listed at a Torino Scale of 1 and a cumulative Palermo Scale of −0.87. [4] It was removed from the Sentry Risk Table on 26 June 2013. [5]

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 18 May 2019 ( M.P.C. 114667). [6] As of 2019, it has not been named. [1]

Orbit and classification

2009 WM1 orbits the Sun at a distance of 0.98–1.38  AU once every 15 months (468 days; semi-major axis of 1.18 AU). Its orbit has an eccentricity of 0.17 and an inclination of 26 ° with respect to the ecliptic. [3]

Even though 2009 WM1 has an Earth MOID of 0.00009 AU (13,000 km; 8,400 mi), the orbit and future close approaches are well determined with an orbital uncertainty of 1. [3]

On 23 November 2059, 2009 WM1 will pass 0.0046  AU (690,000  km; 430,000  mi) from Earth. [7] On 23 November 2199, it will make another close approach at a distance of 0.0005  AU (75,000  km; 46,000  mi) to 0.069 AU, but since it is a close approach and the exact distance in uncertain, future close approaches after 2199 are uncertain. [7]

2014 passage

The 21 May 2014 Earth close approach of 0.3622 AU (54,180,000 km; 33,670,000 mi) should allow a refinement to the orbit. [7] From 7 May 2014 until 2 June 2014 the asteroid will be brighter than apparent magnitude 20. [8] The asteroid will come to opposition on 18 May 2014 when it will be up all night. [8]

References

  1. ^ a b c d "529366 (2009 WM1)". Minor Planet Center. Retrieved 29 May 2019.
  2. ^ "MPEC 2009-W30 : 2009 WM1". IAU Minor Planet Center. 18 November 2009. Retrieved 26 June 2012. (K09W01M)
  3. ^ a b c d e "JPL Small-Body Database Browser: 529366 (2009 WM1)" (2018-11-13 last obs.). Jet Propulsion Laboratory. Retrieved 29 May 2019.
  4. ^ a b c d "Earth Impact Risk Summary: 2009 WM1". Wayback Machine: NASA/JPL Near-Earth Object Program Office. Archived from the original on 27 November 2009. Retrieved 27 July 2013.
  5. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Archived from the original on 2 June 2002. Retrieved 2 September 2013.
  6. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 29 May 2019.
  7. ^ a b c "JPL Close-Approach Data: (2009 WM1)" (2013-07-06). Retrieved 31 January 2013.
  8. ^ a b "2009WM1 Ephemerides for 1 May 2014 through 15 June 2014". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 1 February 2014.

External links

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