(144898) 2004 VD17

(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]

(144898) 2004 VD17
Discovery
Discovered byLINEAR
Discovery date7 November 2004
Designations
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc4778 days (13.08 yr)
Aphelion2.39574 AU (358.398 Gm)
Perihelion0.619854 AU (92.7288 Gm)
1.50780 AU (225.564 Gm)
Eccentricity0.588901
1.85 yr (676.26 d)
42.8439°
0° 31m 56.428s / day
Inclination4.22348°
224.055°
90.9290°
Earth MOID0.00183487 AU (274,493 km)
Physical characteristics
Mean diameter
0.5–1.1 km
Mass(0.13–1.8)×1012 kg
1.99 h (0.083 d)
0.15
E[2]
18.8

    Description

    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.[4] The Torino rating was lowered to 1 after additional observations on 20 May 2006, and finally dropped to 0 on 17 October 2006. It was removed from the Sentry Risk Table on 14 February 2008.[5]

    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.[6] This value was far below the background impact rate of objects this size.

    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.[6]

    It will pass 0.02 AU (3,000,000 km; 1,900,000 mi) from the Earth on 1 May 2032, allowing a refinement to the orbit.[1]

    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.[7]

    See also

    References
    1. "JPL Close-Approach Data: 144898 (2004 VD17)" (2009-01-03 last obs and observation arc=6.8 years). Retrieved 7 April 2016.
    2. 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.
    3. "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)
    4. 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.
    5. "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 7 August 2013.
    6. "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)
    7. Kimm Groshong (1 March 2006). "New asteroid at top of Earth-threat list". New Scientist. Retrieved 28 December 2007.
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