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Discovery[1]
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|---|---|
| Discovered by | Catalina Sky Survey (703) 0.68-m Schmidt |
| Discovery date | 2010 12 05 |
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Designations
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| MPC designation | 2010 XC15 |
| Minor planet category |
Aten NEO, PHA[2] |
| Epoch 2011-Aug-27 (Uncertainty=6)[2] |
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| Aphelion | 1.04 AU (Q) |
| Perihelion | 0.428 AU (q) |
| Semi-major axis | 0.734 AU (a) |
| Eccentricity | 0.416 |
| Orbital period | 0.63 yr |
| Mean anomaly | 233° (M) |
| Inclination | 8.38° |
| Longitude of ascending node | 94.5° |
| Argument of perihelion | 157° |
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Physical characteristics
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| Dimensions | ~200 metres (660 ft)[3] |
| Absolute magnitude (H) | 21.4[2] |
2010 XC15 (also written 2010 XC15) is a near-Earth asteroid and potentially hazardous object.[2] It has a modest observation arc of 40 days and an Uncertainty Parameter of 6.[2] It was discovered on 5 December 2010 by the Catalina Sky Survey at an apparent magnitude of 17.5 using a 0.68-metre (27 in) Schmidt.[1]
Based on an absolute magnitude of 21.4,[2] the asteroid has an estimated diameter of about 200 metres (660 ft).[3] 2010 XC15 is noted for a close approach to the Earth around 26-27 December 1976 at a nominal distance of about 0.002 AU (300,000 km; 190,000 mi).[4][5] As of November 2011[update], JPL shows that the uncertainty region of the asteroid during the 1976 could pass anywhere from 0.001 AU to 0.018 AU from the Earth.[4] It is one the largest objects calculated to have come inside the orbit of the moon. During the 1976 close approach the asteroid probably reached about apparent magnitude 11.[6]
The asteroid will pass 0.009 AU (1,300,000 km; 840,000 mi) from the Earth on 28 December 2022,[4][5] allowing a refinement to the known trajectory and the 1976 close approach.
The asteroid 2002 JE9, with a much larger observation arc, is known to have passed 0.001 AU (150,000 km; 93,000 mi) from the Earth on 11 April 1971.
| Preceded by 2002 JE9 |
Large NEO Earth close approach (inside the orbit of the moon) 26-27 December 1976 |
Succeeded by 2005 YU55 |
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