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 2012-Mar-14
(Uncertainty=1)[2]
Aphelion 1.3799 AU (Q)
Perihelion 0.98095 AU (q)
1.1804 AU (a)
Eccentricity 0.16901
1.28 yr
306.88° (M)
Inclination 25.766°
240.29°
162.60°
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 5 "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. 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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