| Discovery [1] | |
|---|---|
| Discovered by | Mt. Lemmon Survey ( G96) |
| Discovery date | 15 November 2007 |
| Designations | |
| 2007 VE191 | |
| 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) |
| 1.9085 AU (285.51 Gm) (a) | |
| Eccentricity | 0.62767 (e) |
| 2.64 yr (963.04 d) | |
| 12.440 ° (M) | |
| 0° 22m 25.752s /day (n) | |
| Inclination | 5.3847° (i) |
| 244.33° (Ω) | |
| 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] |
| 23.6 [2] | |
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]
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
- ^ a b "MPEC 2007-W05 : 2007 VE191". IAU Minor Planet Center. 16 November 2007. Retrieved 15 December 2014. (K07VJ1E)
- ^ a b c d e f "JPL Small-Body Database Browser: (2007 VE191)" (last observation: 2007-11-28; arc: 13 days). Jet Propulsion Laboratory. Retrieved 30 March 2016.
- ^ a b c "Earth Impact Risk Summary: 2007 VE191". NASA/JPL Near-Earth Object Program Office. Archived from the original on 5 September 2015. Retrieved 15 December 2014. ( PS=–2.47)
- ^ a b "Absolute Magnitude (H)". NASA/JPL. Archived from the original on 2 March 2001. Retrieved 15 December 2014.
- ^ "2007VE191 Ephemerides for 1 September 2015 through 10 December 2015". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 15 December 2014.
- ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Archived from the original on 2 June 2002. Retrieved 19 October 2015.
- ^ "NEODyS Impactor Table for 2007VE191". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 19 October 2015. ( PS=–4.87)
- ^ "JPL Close-Approach Data: (2007 VE191)" (last observation: 2007-11-28; arc: 13 days). Retrieved 15 December 2014.
- ^ "2007VE191 Ephemerides for 1 October 2007 through 4 December 2007". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 15 December 2014.
External links
- 2007 VE191 at NeoDyS-2, Near Earth Objects—Dynamic Site
- 2007 VE191 at ESA– space situational awareness
- 2007 VE191 at the JPL Small-Body Database
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