| 释义 |
- See also
- References
- External links
{{DISPLAYTITLE:{{mp|(481482) 2007 CA|19}}}}{{Infobox planet
| minorplanet= yes
| background= #FFC2E0
| name= {{mp|(481482) 2007 CA|19}}
| discoverer= Catalina Sky Survey
| discovered= 11 February 2007
| alt_names= {{mp|2007 CA|19}}
| mp_category= NEO{{·}}Apollo{{·}}PHA
Earth-crosser
Mars-crosser
| epoch= 13 January 2016 (JD 2457400.5)
| semimajor= {{Convert|2.81030|AU|Gm|abbr=on}}
| perihelion= {{Convert|0.502914|AU|Gm|abbr=on}}
| aphelion= {{Convert|5.11769|AU|Gm|abbr=on|lk=on}}
| eccentricity= 0.821046
| period= 4.71 yr (1720.8 d)
| inclination= 9.58919°
| asc_node= 170.154°
| arg_peri= 102.390°
| mean_anomaly= 306.543°
| dimensions= 0.864 km
| mass= 8.9{{e|11}} kg
| density= 2.6 g/cm³
| abs_magnitude= 17.6
| mean_motion= {{Deg2DMS|0.209206|sup=ms}} /day
| orbit_ref= [1]
| observation_arc= 3258 days (8.92 yr)
| uncertainty= 0
| moid= {{Convert|0.0193363|AU|Gm|abbr=on}}
}}{{mp|(481482) 2007 CA|19}} 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 {{mp|2007 CA|19}}, 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.[{{mp|2007 CA|19}} 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.][ 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.[4]{{mp|2007 CA|19}} passed about {{convert|0.007|AU|km mi|abbr=on|lk=on}} from Venus on 6 July 1946.[1]] See also - List of notable asteroids
- Asteroid deflection strategies
- Asteroid naming conventions
References 1. ^1 {{cite web |title=Date/Time Removed |publisher=NASA/JPL Near-Earth Object Program Office |url=http://neo.jpl.nasa.gov/risk/removed.html |accessdate=2013-07-27}}
2. ^1 2 {{cite web |quote=2008-02-14 last obs (arc=5.85 yr) |title=JPL Close-Approach Data: (2007 CA19) |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007CA19;cad=1#cad |accessdate=30 March 2016}}
(1.6e-06 = 1 in 625,000 chance)[1][2]
}} External links - {{mp|2007 CA|19}} object data
- {{JPL Small Body}}
{{Minor planets navigator| |number=481482 |PageName={{mp|(481482) 2007 CA|19}} |}}{{Small Solar System bodies}}{{DEFAULTSORT:2007 CA19}} 4 : Apollo asteroids|Discoveries by CSS|Potentially hazardous asteroids|Astronomical objects discovered in 2007 |