(481482) 2007 CA19 is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group. It led the impact hazard list, with a Torino Scale impact risk value of 1, for one week, ending on February 19, 2007. Before and after 2007 CA19, 99942 Apophis was the object with the highest Palermo Scale rating. With an observation arc of 4.8 days, it had a Palermo Scale of −0.88.[2]
| Discovery | |
|---|---|
| Discovered by | Catalina Sky Survey |
| Discovery date | February 11, 2007 |
| Designations | |
| 2007 CA19 | |
| Orbital characteristics[1] | |
| Epoch January 13, 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 3258 days (8.92 yr) |
| Aphelion | 5.11769 AU (765.596 Gm) |
| Perihelion | 0.502914 AU (75.2349 Gm) |
| 2.81030 AU (420.415 Gm) | |
| Eccentricity | 0.821046 |
| 4.71 yr (1720.8 d) | |
| 306.543° | |
| 0° 12m 33.142s /day | |
| Inclination | 9.58919° |
| 170.154° | |
| 102.390° | |
| Earth MOID | 0.0193363 AU (2.89267 Gm) |
| Physical characteristics | |
Mean diameter | 0.864 km[citation needed] |
| Mass | 8.9×1011 kg[citation needed] |
Mean density | 2.6 g/cm3[citation needed] |
| 17.6 | |
2007 CA19 was discovered on February 11, 2007, by the Catalina Sky Survey at the University of University of Arizona. The object is estimated at 966 metres in diameter with a mass of a 1.2x1012 kg. Until February 15, it had an impact probability of 1/625000 for the day March 14, 2012.[2] Additional observations through February 19 decreased the impact probability to ~1 in 300 million, making it of negligible concern. It was removed from the Sentry Risk Table on February 22, 2007.[3]
2007 CA19 passed about 0.007 AU (1,000,000 km; 650,000 mi) from Venus on July 6, 1946.[1]
See also edit
References edit
- ^ a b "JPL Close-Approach Data: (2007 CA19)". Retrieved March 30, 2016.
2008-02-14 last obs (arc=5.85 yr)
- ^ a b "Earth Impact Risk Summary: 2007 CA19". Wayback Machine: NASA/JPL Near-Earth Object Program Office. Archived from the original on February 16, 2007. (1.6e-06 = 1 in 625,000 chance)
- ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Archived from the original on June 2, 2002. Retrieved July 27, 2013.
External links edit
- (481482) 2007 CA19 at NeoDyS-2, Near Earth Objects—Dynamic Site
- (481482) 2007 CA19 at ESA–space situational awareness
- (481482) 2007 CA19 at the JPL Small-Body Database
