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Discovery
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| Discovered by | Catalina Sky Survey |
| Discovery date | November 11, 2007 |
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Designations
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| Minor planet category |
Apollo |
| Epoch May 14, 2008 (JD 2454600.5) | |
| Aphelion | 2.71033672844745±0.00022713 AU |
| Perihelion | 0.7426802273959253±6.7313e-06 AU |
| Semi-major axis | 1.726508477921687±0.00014468 AU |
| Eccentricity | 0.5698369067437545±3.9672e-05 |
| Orbital period | 828.6125366901762±0.10416 d (2.27±0.0002852 a) |
| Average orbital speed | 15.63 km/s |
| Mean anomaly | 102.686674978651±0.013484° |
| Inclination | 1.222310015202323±9.8849e-05° |
| Longitude of ascending node | 254.0587808820642±0.0010227° |
| Argument of perihelion | 73.0616457437701±0.0014356° |
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Physical characteristics
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| Dimensions | 130 m |
| Mass | 3.3x109 kg |
| Absolute magnitude | 22.002[1] |
2007 VK184 is an asteroid which is listed on the Near Earth Object Risk List with a rating on the Torino Scale of Level 1. As of 8 August 2008, it is the only near-earth object to be listed above Level 0 for potential impacts within 100 years. VK184 was discovered on November 12th 2007, by the Catalina Sky Survey.[citation needed]
Further observations between December 18th, 2007 and January 4th, 2008, suggested an increase in the impact probability to 1 in 2700 chance for an impact with Earth during June 2048. A few days later, the impact probability was reverted back to a 1 in 3030 chance.
According to the Near Earth Object-list, 99 observations over 52 days suggests the asteroid has a probability of 1 in 2700 chance to hit the Earth during June 2048. Those figures translates into a 0.037% chance to hit (or 99.963% to miss). The asteroid is estimated to have a diameter of 130 meters, and travels through space with a speed of 15.63 km/s relative to the Earth.
Asteroids with listing above 1 on the Torino Scale are rare and are, according to NEO, often downgraded to Level 0 after the initial observations.
References
- NASA JPL Small-Body Database Browser on 2007 VK184
- http://neo.jpl.nasa.gov/risk/2007vk184.html
- http://cfa-www.harvard.edu/iau/lists/Dangerous.html
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