2012 KP24

2012 KP₂₄

Discovery[1]
Discovered by	Mount Lemmon Survey (G96)
Discovery date	23 May 2012
Designations
MPC designation	2012 KP24
Minor planet category	Apollo NEO[2]
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 6
Aphelion	2.0520 AU (306.97 Gm) (Q)
Perihelion	0.94492 AU (141.358 Gm) (q)
Semi-major axis	1.4984 AU (224.16 Gm) (a)
Eccentricity	0.36940 (e)
Orbital period	1.83 yr (669.97 d)
Mean anomaly	332.94° (M)
Mean motion	0° 32^m 14.388^s /day (n)
Inclination	18.471° (i)
Longitude of ascending node	67.469° (Ω)
Argument of perihelion	221.47° (ω)
Earth MOID	0.000888654 AU (132,940.7 km)
Jupiter MOID	3.15601 AU (472.132 Gm)
Physical characteristics
Dimensions	~17 meters (56 ft)[3]
Mass	7.2×10^6 kg (assumed)[3]
Rotation period	0.041667 h (2.5000 min)
Sidereal rotation period	0.04166 hr (2.5 min)[2]
Apparent magnitude	13.3 (2012 passage)[4]
Absolute magnitude (H)	26.4[2]

2012 KP₂₄ (also written 2012 KP24) is a near-Earth asteroid with an observation arc of only 5 days and has a modestly determined orbit for an object of its size.^[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. 2010-05-24. Retrieved 2013-03-02. (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. 2013-05-12. Archived from the original on May 12, 2013. Retrieved 2013-08-11. (1.1e-07 = 1 in 9,091,000 chance)
4. "2012KP24 Ephemerides for 28 May 2012". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 2013-03-02.
5. "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2013-08-11.
6. Math: 10^7.22 = 16,595,869
7. "The Palermo Technical Impact Hazard Scale". NASA/JPL Near-Earth Object Program Office. 31 Aug 2005. Retrieved 2011-10-14.

External links

• 2012 KP24 at the JPL Small-Body Database
  
  • Discovery · Orbit diagram · Orbital elements · Physical parameters