(144898) 2004 VD17
| Discovery and designation | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Discovered by | LINEAR | ||||||||
| Discovery date | November 7, 2004 | ||||||||
| Designations | |||||||||
|
Apollo asteroid, Earth-crosser asteroid Venus-crosser asteroid Mars-crosser asteroid | |||||||||
| Orbital characteristics | |||||||||
| Epoch September 21, 2006 | |||||||||
| Aphelion | 358.422 Gm (2.3959 AU) | ||||||||
| Perihelion | 92.8 Gm (0.6204 AU) | ||||||||
| 225.610 Gm (1.50815 AU) | |||||||||
| Eccentricity | 0.588654 | ||||||||
| 676.499 d (1.85 a) | |||||||||
| 33.427° | |||||||||
| Inclination | 4.223° | ||||||||
| 224.241° | |||||||||
| 90.687° | |||||||||
| Physical characteristics | |||||||||
| Dimensions | 0.5-1.1 km | ||||||||
| Mass | 0.13-1.8×1012 kg | ||||||||
Mean density | 2.0? g/cm³ | ||||||||
Equatorial escape velocity | 0.0003–0.0006 km/s | ||||||||
| 0.15 | |||||||||
| |||||||||
| E[1] | |||||||||
| 18.90 | |||||||||
|
| |||||||||
(144898) 2004 VD17 (previously known by its provisional designation 2004 VD17) is a near-Earth asteroid once thought to have a low probability of impacting Earth on May 4, 2102.[2] From February to May 2006 it was listed with a Torino Scale impact risk value of 2, only the second asteroid in risk-monitoring history to be rated above value 1.[3] The Torino rating was lowered to 1 after additional observations on May 20, 2006, and finally dropped to 0 on October 17, 2006. It was removed from the Sentry Risk Table on 14 February 2008.[4]
As of January 4, 2008, the Sentry Risk Table assigned 2004 VD17 a Torino value of 0 and an impact probability of 1 in 58.8 million for May 4, 2102.[5] This value was far below the background impact rate of objects this size.
2004 VD17 was discovered on November 7, 2004, by the NASA-funded LINEAR asteroid survey. The object is estimated by NASA's Near Earth Object Program Office to be 580 meters in diameter with an approximate mass of 2.6×1011 kg.[5]
It will pass 0.02 AU (3,000,000 km; 1,900,000 mi) from the Earth on May 1, 2032, allowing a refinement to the orbit.[6]
Being ~580 meters in diameter, if 2004 VD17 were to impact land, it would produce a crater about 10 kilometres wide and an earthquake of magnitude 7.4.[7]
See also
- 3103 Eger
- 99942 Apophis
- Aubrite
- E-type asteroid
- Hungaria family
- List of notable asteroids
- Asteroid deflection strategies
References
- ↑ Luise, F. De; Perna, D.; Dotto, E.; Fornasier, S.; Belskaya, I.N.; Boattini, A. (2007). "Physical Investigation of the Potentially Hazardous Asteroid (144898) 2004 VD17". Icarus 191 (2): 628–635. arXiv:0706.1140. doi:10.1016/j.icarus.2007.05.018.
- ↑ "WayBack Machine archive from 17 April 2006". Wayback Machine. 2006-04-17. Archived from the original on 2006-04-17. Retrieved 2013-08-07. (7.6e-04 = 1 in 1,320 chance)
- ↑ David Morrison (March 1, 2006). "Asteroid 2004 VD17 classed as Torino Scale 2". Asteroid and Comet Impact Hazards (NASA). Retrieved 2011-11-06.
- ↑ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2013-08-07.
- ↑ 5.0 5.1 "WayBack Machine archive from 4 January 2008". Wayback Machine. 2008-01-04. Archived from the original on 2008-01-04. Retrieved 2013-08-07. (1.7e-08 = 1 in 58,824,000 chance)
- ↑ "JPL Close-Approach Data: 144898 (2004 VD17)" (2009-01-03 last obs and observation arc=6.8 years). Retrieved 2011-11-06.
- ↑ Kimm Groshong (1 March 2006). "New asteroid at top of Earth-threat list". New Scientist. Retrieved 2007-12-28.
External links
| ||||||
| ||||||||||||||||||||||||||||
