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Discovery
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|---|---|
| Discovered by | Spacewatch 0.9m telescope |
| Discovery date | September 20, 2006 |
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Designations
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| Alternate name(s) | none |
| Minor planet category |
Apollo asteroid, Earth-crosser asteroid Mars-crosser asteroid |
| Epoch September 26, 2006 (MJD 54004.1) | |
| Aphelion | 1.8541 AU |
| Perihelion | 0.9714 AU |
| Semi-major axis | 1.41277 AU |
| Eccentricity | 0.312416 |
| Orbital period | 613.355 days |
| Average orbital speed | ? m/s |
| Mean anomaly | 241.656° |
| Inclination | 2.522° |
| Longitude of ascending node | 303.28° |
| Argument of perihelion | 198.869° |
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Physical characteristics
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| Dimensions | 0.380 km |
| Mass | 7.4×1010 kg |
| Mean density | 2.6 g/cm³ |
| Equatorial surface gravity | ? m/s² |
| Escape velocity | ? km/s |
| Rotation period | ? d |
| Albedo | ? |
| Temperature | ? K |
| Spectral type | ? |
| Absolute magnitude (H) | 19.581 |
2006 SU49 (also written 2006 SU49) is a near-Earth asteroid with a low but non-zero probability of impacting Earth in 2029. As of October 29, 2006, it was listed with a Torino Scale impact risk value of 0.
It is a near-Earth asteroid that caused a brief period of minor concern in late September and early October 2006 because initial observations indicated a higher than usual probability that it would strike the Earth in 2029. However, the Near-Earth Object (NEO) Office at NASA's Jet Propulsion Laboratory (JPL) removed 2006 SU49 from its risk list as additional observations provided improved predictions that eliminated the possibility of an impact on Earth or the Moon through 2106. Similarly, NEODyS estimates show a zero impact probability through 2080.
2006 SU49 briefly led the Earth-impact hazard list from September 27, 2006, through October 4, 2006, temporarily displacing 2004 VD17 from the number one position. At the time, both held a Torino scale of level 1 and were the only listed asteroids (other than 1950 DA) to hold a Torino value greater than 0.
2006 SU49 was discovered on September 20, 2006, by the Spacewatch project at the University of Arizona. The object is estimated at 380 meters in diameter with a mass of about 7.4×1010 kg.
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