astro.wikisort.org - Asteroid

2007 VE₁₉₁ is a sub-kilometer asteroid, classified as near-Earth asteroid of the Apollo group that was listed on the Sentry Risk Table.[3]

2007 VE₁₉₁

Discovery[1]
Discovered by	Mt. Lemmon Survey (G96)
Discovery date	15 November 2007
Designations
MPC designation	2007 VE191
Minor planet category	NEO · Apollo[2]
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 7
Observation arc	13 days (last seen 2007)
Aphelion	3.1065 AU (464.73 Gm) (Q)
Perihelion	0.71060 AU (106.304 Gm) (q)
Semi-major axis	1.9085 AU (285.51 Gm) (a)
Eccentricity	0.62767 (e)
Orbital period (sidereal)	2.64 yr (963.04 d)
Mean anomaly	12.440° (M)
Mean motion	0° 22m 25.752s /day (n)
Inclination	5.3847° (i)
Longitude of ascending node	244.33° (Ω)
Argument of perihelion	254.07° (ω)
Earth MOID	0.000169707 AU (25,387.8 km)
Jupiter MOID	1.99284 AU (298.125 Gm)
Physical characteristics
Dimensions	~63 meters[3] 50–110 meters[4]
Absolute magnitude (H)	23.6[2]

Description

It is estimated to be roughly 63 meters in diameter. In 2015 it was known to have a 1 in 63,000 chance of impacting Earth on 27 November 2015.[3] However, the nominal best-fit orbit showed that 2007 VE₁₉₁ would 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 gave 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 was still listed at NEODyS with odds of 1 in 3 million for 27 November 2015 during the approach window.[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

External links

• 2007 VE191 at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
• 2007 VE191 at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical Properties · Summary
• 2007 VE191 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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