2007 VK184
The 2014 close approach of 2007 VK184
|
|
| Discovery | |
|---|---|
| Discovered by | Catalina Sky Survey (703) |
| Discovery date | November 12, 2007 |
| Designations | |
| Apollo NEO | |
| Orbital characteristics | |
|
Epoch 2014-May-23 (JD 2456800.5) (Uncertainty=1) |
|
| Aphelion | 2.7104 AU |
| Perihelion | 0.74227 AU |
| 1.7263 AU | |
| Eccentricity | 0.57003 |
| 828.49 d (2.27 yr) | |
|
Average orbital speed
|
15.6 km/s |
| 338.50° | |
| Inclination | 1.2225° |
| 253.96° | |
| 73.159° | |
| Physical characteristics | |
| Dimensions | ~130 meters (430 ft) |
| Mass | 3.3×109 kg (assumed) |
| ~0.065 meters (2.6 in) per second | |
| 22.0 | |
2007 VK184 (also written 2007 VK184) is an Apollo near-Earth asteroid estimated to be about 130 meters (430 ft) in diameter. It was listed on the Sentry Risk Table with a Torino Scale rating of 1. A Torino scale rating of 1 is a routine discovery in which a pass near the Earth is predicted that poses no unusual level of danger.2007 VK184 was discovered on November 12, 2007, by the Catalina Sky Survey. It was recovered on March 26, 2014 by Mauna Kea, and removed from the Sentry Risk Table on March 28, 2014.
By January 4, 2008, with an observation arc of 52 days, there was a 1 in 2700 chance of an impact with Earth on June 3, 2048.
The Sentry Risk Table, using an observation arc of 60 days, showed the asteroid had a 1 in 1820 chance (0.055%) of impacting Earth on June 3, 2048. Since the March 2014 recovery, it is known that the asteroid will pass 0.013 AU (1,900,000 km; 1,200,000 mi) from Earth on June 2, 2048.
Before the 2014 close approach, the asteroid had a modest observation arc of 60 days, and the imprecise trajectory of this asteroid was complicated by close approaches to Earth, Venus and Mars. On May 23, 2014, the asteroid passed 0.17 AU (25,000,000 km; 16,000,000 mi) from Earth and reached an apparent magnitude of ~20.8. As expected the close approach allowed astronomers to recover the asteroid on March 26, 2014 and refine the odds of a future collision. As the asteroid gets closer to Earth, the positional uncertainty becomes larger. By recovering the asteroid well before closest approach you can avoid searching a larger region of the sky. Most asteroids rated 1 on the Torino Scale are later downgraded to 0 after more observations come in.
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