| Discovery | |
|---|---|
| Discovered by | LINEAR |
| Discovery date | 7 November 2004 |
| Designations | |
| Orbital characteristics [1] | |
| Epoch 2022-Jan-21 ( JD 2459600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 17.8 years |
| Aphelion | 2.3958 AU (358.41 million km) |
| Perihelion | 0.62008 AU (92.763 million km) |
| 1.5079 AU (225.58 million km) | |
| Eccentricity | 0.58878 |
| 1.85 yr (676.34 d) | |
| 133.93 ° | |
| 0° 31m 56.428s / day | |
| Inclination | 4.2239° |
| 224° | |
| 90.97° | |
| Earth MOID | 0.0015 AU (220,000 km) |
| Physical characteristics | |
Mean diameter | 320m
[2] 580m (assumed) [3] 0.5–1.0 km (CNEOS) |
| Mass | (0.13–1.8)×1012 kg |
| 1.99 h (0.083 d) | |
| E [2] | |
| 18.8 | |
(144898) 2004 VD17 ( provisional designation 2004 VD17) is a sub-kilometer asteroid, classified as near-Earth object of the Apollo group once thought to have a low probability of impacting Earth on 4 May 2102. [3] It reached a Torino Scale rating of 2 and a Palermo Technical Impact Hazard Scale rating of -0.25. [3] With an observation arc of 17 years it is known that closest Earth approach will occur two days earlier on 2 May 2102 at a distance of about 5.5 million km. [1]
| Date |
JPL SBDB nominal geocentric distance |
uncertainty region ( 3-sigma) |
|---|---|---|
| 2032-05-01 | 3140133 km | ± 127 km [4] |
| 2102-05-02 | 5568961 km | ± 50 thousand km |
| 2196-05-05 | 996859 km | ± 354 thousand km |
History
2004 VD17 was discovered on 7 November 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]
Being approximately 580 meters in diameter, if 2004 VD17 were to impact land, it would create an impact crater about 10 kilometres wide and generate an earthquake of magnitude 7.4. [6]
Elevated risk estimate in 2006
From February to May 2006, 2004 VD17 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. [7] With an observation arc of 1511 days, it was estimated to have a 1 in 1320 chance of impacting on 4 May 2102. [3] The Torino rating was lowered to 1 after additional observations on 20 May 2006, and finally dropped to 0 on 17 October 2006.
2008 observations
As of 4 January 2008, the Sentry Risk Table assigned 2004 VD17 a Torino value of 0 and an impact probability of 1 in 58.8 million for 4 May 2102. [5] This value was far below the background impact rate of objects this size. Further observations allowed it to be removed from the Sentry Risk Table on 14 February 2008. [8]
It will pass 0.021 AU (3,100,000 km; 2,000,000 mi) from the Earth on 1 May 2032, allowing a refinement to the orbit. [1]
Properties
It has a spectral type of E. [2] This suggests that the asteroid has a high albedo and is on the smaller size range for an object with an absolute magnitude of 18.8.
![[icon]](/info/en/?search=File:Wiki_letter_w_cropped.svg){kind=small} | This section needs expansion. You can help by
adding to it. (December 2021) |
See also
- 3103 Eger, possible parent of the Aubrite asteroids
- 99942 Apophis
- Asteroid impact avoidance
- Aubrite asteroid family
- E-type asteroid
- Hungaria family of asteroids
- List of exceptional asteroids
References
- ^ a b c d "JPL Close-Approach Data: 144898 (2004 VD17)". Retrieved 12 December 2021.
- ^ a b c 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. Bibcode: 2007Icar..191..628D. doi: 10.1016/j.icarus.2007.05.018. S2CID 14400781.
- ^ a b c d "WayBack Machine archive from 17 April 2006". Wayback Machine. 17 April 2006. Archived from the original on 17 April 2006. Retrieved 7 August 2013. ( 7.6e-04 = 1 in 1,320 chance)
- ^ "Horizons Batch for 2032-May-01 22:37 UT". JPL Horizons. Archived from the original on 12 December 2021. Retrieved 12 December 2021.
- ^ a b "WayBack Machine archive from 4 January 2008". Wayback Machine. 4 January 2008. Archived from the original on 4 January 2008. Retrieved 7 August 2013. ( 1.7e-08 = 1 in 58,824,000 chance)
- ^ Kimm Groshong (1 March 2006). "New asteroid at top of Earth-threat list". New Scientist. Retrieved 28 December 2007.
- ^ David Morrison (1 March 2006). "Asteroid 2004 VD17 classed as Torino Scale 2". Asteroid and Comet Impact Hazards (NASA). Archived from the original on 14 October 2011. Retrieved 6 November 2011.
- ^ "Date/Time Removed" (listed as 144898). NASA/JPL Near-Earth Object Program Office. Archived from the original on 1 March 2008. Retrieved 13 December 2021.
External links
- (144898) 2004 VD17 at NeoDyS-2, Near Earth Objects—Dynamic Site
- (144898) 2004 VD17 at ESA– space situational awareness
- (144898) 2004 VD17 at the JPL Small-Body Database
