2009 WM1

2009 WM1
Discovery[1]
Discovered by Catalina Sky Survey (703)
0.68-m Schmidt
Discovery date 2009 Nov 17
Designations
MPC designation 2009 WM1
Apollo NEO,
PHA[2]
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 1642 days (4.50 yr)
Aphelion 1.3801 AU (206.46 Gm) (Q)
Perihelion 0.98103 AU (146.760 Gm) (q)
1.1806 AU (176.62 Gm) (a)
Eccentricity 0.16902 (e)
1.28 yr (468.53 d)
302.65° (M)
0° 46m 6.096s /day (n)
Inclination 25.765° (i)
240.28° (Ω)
162.58° (ω)
Earth MOID 0.000480406 AU (71,867.7 km)
Jupiter MOID 3.98384 AU (595.974 Gm)
Physical characteristics
Dimensions ~280 metres (920 ft)[3]
Mass 2.9×1010 kg[3]
20.4[2]

    2009 WM1 is an Apollo near-Earth asteroid[4] that is estimated to be 280 metres in diameter with an estimated mass of 2.9×1010 kg.[3] When the asteroid was first discovered for about a month it was briefly listed at a Torino Scale of 1 and a cumulative Palermo Scale of −0.87.[3] It was removed from the Sentry Risk Table on 26 June 2013.[5] 2009 WM1 will pass 0.0046 AU (690,000 km; 430,000 mi) from Earth on 2059-Nov-23.[6]

    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.[2] 2009 WM1 will pass Earth at a distance of 0.0005 AU (75,000 km; 46,000 mi) to 0.069AU on 2199-Nov-23,[6] but since it is a close approach and the exact distance in uncertain, future close approaches after 2199 are uncertain.

    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.[6] From 7 May 2014 until 2 June 2014 the asteroid will be brighter than apparent magnitude 20.[7] The asteroid will come to opposition on 18 May 2014 when it will be up all night.[7]

    References

    1. ↑ "MPEC 2009-W30 : 2009 WM1". IAU Minor Planet Center. 2009-11-18. Retrieved 2012-06-26. (K09W01M)
    2. 1 2 3 4 "JPL Small-Body Database Browser: (2009 WM1)" (2013-07-06). Jet Propulsion Laboratory. Retrieved 2013-01-31.
    3. 1 2 3 4 "Earth Impact Risk Summary: 2009 WM1". Wayback Machine: NASA/JPL Near-Earth Object Program Office. Archived from the original on November 27, 2009. Retrieved 2013-07-27.
    4. ↑ smallbodies 13:52 9.10.11
    5. ↑ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2013-09-02.
    6. 1 2 3 "JPL Close-Approach Data: (2009 WM1)" (2013-07-06). Retrieved 2013-01-31.
    7. 1 2 "2009WM1 Ephemerides for 1 May 2014 through 15 June 2014". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 2014-02-01.

    External links

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