2007 VK 184
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Asteroid 2007 VK 184 |
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| Properties of the orbit ( animation ) | |
| Orbit type | Apollo type |
| Major semi-axis | 1.72651 AU |
| eccentricity | 0.569837 |
| Perihelion - aphelion | 0.74268 AU - 2.7103 AU |
| Inclination of the orbit plane | 1.2 ° |
| Sidereal period | 828 d 15 h |
| Mean orbital velocity | 15.63 km / s |
| Physical Properties | |
| Medium diameter | 130 m |
| Dimensions | 3.3 × 10 9 kg |
| Absolute brightness | 22,002 mag |
| history | |
| Explorer | Catalina Sky Survey |
| Date of discovery | November 11, 2007 |
| 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. | |
2007 VK 184 is a near-Earth asteroid and was classified by NASA as the only object with a value of 1 on the Turin scale until March 28, 2014 . Until then, it was considered to be the most dangerous known near-earth object , which was to hit the earth in June 2048 with a probability of 0.034% (1: 2940) .
However, on April 2, 2014 NASA announced that 2007 VK 184 will pass Earth in June 2048 with a minimum distance of 1.9 million kilometers due to new observations. Impact is thus excluded. The asteroid poses no threat in the foreseeable future either .
Since an impact from 2007 VK 184 was considered possible until March 28, 2014, the consequences of an impact were calculated. The impact simulation according to Marcus, Melosh, Collins gives the following results:
- The general risk (“background risk”) for such an impact is around one event every 53,000 years.
- In the event of an impact, around 60 megatons of TNT would be released; the remaining energy is lost by the asteroid when it enters the atmosphere. This corresponds to 1.25 times the most powerful nuclear weapon ever detonated (Soviet Tsar bomb ), 2.5 times the most powerful nuclear weapon ever mass-produced (US model Mark 41) or around 3000 Hiroshima bombs.
- A hit on sedimentary rock would form a crater around 2.3 km in diameter.
- A fireball with a hazard to the wider environment from thermal radiation would not arise.
- At a distance of 100 km from the impact, the debris would primarily fall as rock dust, but impacts of fragments with an average diameter of 1.4 cm would also have to be expected at this distance.
- The seismic energy would roughly correspond to a 5.8 magnitude earthquake on the Richter scale.
See also
Web links
- Approximate simulation of impact effects
- VK184 specification Torino Scale Nasa website ( Memento from March 20, 2014 in the Internet Archive )
- Current risk assessment from April 2, 2014