(144898) 2004 VD 17
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Asteroid (144898) 2004 VD 17th |
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| Properties of the orbit ( animation ) | |
| Orbit type | Apollo type |
| Major semi-axis | 1.508 AU |
| eccentricity | 0.589 |
| Perihelion - aphelion | 0.621 AU - 2.396 AU |
| Inclination of the orbit plane | 4.222 ° |
| Sidereal period | 1 a 311 d |
| Mean orbital velocity | 24.26 km / s |
| Physical Properties | |
| Medium diameter | 0.5-1.2 km |
| Dimensions | ~ 3 × 10 11 kg |
| Absolute brightness | 18.8 mag |
| history | |
| Explorer | LINEAR |
| Date of discovery | November 7, 2004 |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(144898) 2004 VD 17 is a small near-Earth asteroid of the Apollo type , which was discovered on November 7, 2004 by the automatic sky monitoring LINEAR (Lincoln Near Earth Asteroid Research) . Due to its optical brightness , the asteroid's diameter is estimated to be 500 to 1,200 meters. It hit the headlines of the tabloids in 2006 due to a temporary small risk of impact on the earth.
Course of the risk
Due to the increasing distance, the first observations in 2004 and 2005 only allowed the prediction that the asteroid will come close to Earth on May 4, 2102, but with a very broad distribution for the location of the orbit. An impact would release energy equivalent to the explosive effect of around 15,000 megatons of TNT and cause continental devastation. In 2006 the asteroid was easier to observe again, the distribution became narrower and much higher, which initially increased the probability that the earth would be hit. Between February and May 2006, it was rated 2 on the Turin scale . 2004 VD 17 was the second asteroid after Apophis to achieve a value of over 1 on this risk scale.
After that, the distribution moved to a narrow range next along the earth. In early 2007, the encounter on the Palermo Scale had a hazard rating of −4.91, which meant that the impact was almost 100,000 times less likely than the so-called background probability that the Earth by May 4, 2102 of any, at least as large, was Object is hit. In the meantime, the impact has been completely ruled out and in 2004 VD 17 has been deleted from the risk list - a typical course.