2012 KP24

2012 KP24 (also written 2012 KP24) is a near-Earth asteroid and fast rotator with an observation arc of only 5 days and has a modestly determined orbit for an object of its size.[2]

2012 KP24
Discovery[1]
Discovered byMLS
Discovery siteMount Lemmon Obs.
Discovery date23 May 2012
Designations
2012 KP24
Apollo · NEO[2]
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 6
Aphelion2.0520 AU (306.97 Gm)
Perihelion0.94492 AU (141.358 Gm)
1.4984 AU (224.16 Gm)
Eccentricity0.36940
1.83 yr (669.97 d)
332.94°
0° 32m 14.388s /day
Inclination18.471°
67.469°
221.47°
Earth MOID0.000888654 AU (0.346 LD)
Physical characteristics
Mean diameter
17 m[3]
Mass7.2×106 kg (est.)[3]
0.041667 h[2]
13.3 (2012 passage)[4]
26.4[2]

    Overview

    It was discovered on 23 May 2012 by the Mount Lemmon Survey at an apparent magnitude of 20.8 using a 1.5-meter (59 in) reflecting telescope.[1] On 28 May 2012 at 15:20 UT, the asteroid passed 0.00038 AU (57,000 km; 35,000 mi) from the center-point of Earth.[2] The asteroid is estimated to be 17 meters (56 ft) in diameter.[3] It was removed from the Sentry Risk Table on 8 August 2013 after Sentry updated to planetary ephemeris (DE431).[5] It has an uncertainty parameter of 6.[2] While listed on the Sentry Risk Table, virtual clones of the asteroid that fit the uncertainty region in the known trajectory showed a 1 in 9,091,000 chance that the asteroid could impact Earth on 2032 May 28.[3] With a Palermo Technical Scale of −7.22,[3] the odds of impact by 2012 KP24 in 2032 were about 16 million times less[6] than the background hazard level of Earth impacts which is defined as the average risk posed by objects of the same size or larger over the years until the date of the potential impact.[7]

    References
    1. "MPEC 2012-K52 : 2012 KP24". IAU Minor Planet Center. 24 May 2010. Retrieved 2 March 2013. (K12K24P)
    2. "JPL Close-Approach Data: (2012 KP24)" (last observation: 2012-05-28; arc: 5 days)). Retrieved 1 April 2016.
    3. "Earth Impact Risk Summary: 2012 KP24". Wayback Machine NASA/JPL Near-Earth Object Program Office. 12 May 2013. Archived from the original on 12 May 2013. Retrieved 11 August 2013. (1.1e-07 = 1 in 9,091,000 chance)
    4. "2012KP24 Ephemerides for 28 May 2012". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 2 March 2013.
    5. "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 11 August 2013.
    6. Math: 107.22 = 16,595,869
    7. "The Palermo Technical Impact Hazard Scale". NASA/JPL Near-Earth Object Program Office. 31 August 2005. Retrieved 14 October 2011.
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