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2007 Ve191

2007 VE191
Discovery[1]
Discovered by Mt. Lemmon Survey (G96)
Discovery date 15 November 2007
Designations
MPC designation 2007 VE191
Apollo NEO[2]
Orbital characteristics[2]
Epoch 2014-Dec-09
(Uncertainty=7)[2]
Observation arc 13 days
(last seen 2007)
Aphelion 3.1 AU (Q)
Perihelion 0.711 AU (q)
1.9 AU (a)
Eccentricity 0.628
2.64 yr
223° (M)
Inclination 5.38 °
244°
254°
Physical characteristics
Dimensions ~63 meters[3]
50 – 110 meters[4]
23.6[2]

2007 VE191 (also written 2007 VE191) is a near-Earth asteroid that was listed on the Sentry Risk Table.[3] It was estimated to be roughly 63 meters in diameter and to have a 1 in 63,000 chance of impacting Earth on 27 November 2015.[3] However, the nominal best-fit orbit shows that 2007 VE191 will be roughly 0.5 AU (75,000,000 km; 46,000,000 mi) from Earth on 27 November 2015 with an apparent magnitude of roughly +25 in the constellation of Virgo about 50 degrees from the Sun,[5] and the same nominal orbit gives a distance of closest approach to Earth of a little under 0.4 AU a few weeks earlier. It was removed from the Sentry Risk Table on 17 September 2015,[6] but is still listed at NEODyS with odds of 1 in 3 million for 27 November 2015.[7]

2007 VE191 was discovered on 15 November 2007 by the Mount Lemmon Survey at an apparent magnitude of 20 using a 1.5-meter (59 in) reflecting telescope.[1] On 28 November 2007, it passed 0.0128 AU (1,910,000 km; 1,190,000 mi) from Earth.[8] 2007 VE191 has an observation arc of 13 days with an uncertainty parameter of 7, which means its orbit is poorly constrained.[2] 2007 VE191 was last observed on 28 November 2007.[2] By 1 December 2007, the asteroid had faded to below magnitude 25.[9]

With an absolute magnitude of 23.6,[2] 2007 VE191 is about 50–110 meters in diameter.[4]

References

  1. ^ a b "MPEC 2007-W05 : 2007 VE191". IAU Minor Planet Center. 2007-11-16. Retrieved 2014-12-15.  (K07VJ1E)
  2. ^ a b c d e f g "JPL Small-Body Database Browser: (2007 VE191)" (last observation: 2007-11-28;  
  3. ^ a b c "Earth Impact Risk Summary: 2007 VE191". NASA/JPL Near-Earth Object Program Office. Retrieved 2014-12-15.  (PS=–2.47)
  4. ^ a b "Absolute Magnitude (H)". NASA/JPL. Retrieved 2014-12-15. 
  5. ^ "2007VE191 Ephemerides for 1 September 2015 through 10 December 2015".  
  6. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2015-10-19. 
  7. ^ "NEODyS Impactor Table for 2007VE191".   (PS=–4.87)
  8. ^ "JPL Close-Approach Data: (2007 VE191)" (last observation: 2007-11-28;  
  9. ^ "2007VE191 Ephemerides for 1 October 2007 through 4 December 2007".  
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