(481482) 2007 CA19

(481482) 2007 CA₁₉ is a sub-kilometer asteroid, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group. It briefly 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]

(481482) 2007 CA₁₉

Discovery
Discovered by	Catalina Sky Survey
Discovery date	February 11, 2007
Designations
Alternative designations	2007 CA19
Minor planet category	NEO Apollo PHA Earth-crosser Mars-crosser
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)
Semi-major axis	2.81030 AU (420.415 Gm)
Eccentricity	0.821046
Orbital period (sidereal)	4.71 yr (1720.8 d)
Mean anomaly	306.543°
Mean motion	0° 12m 33.142s /day
Inclination	9.58919°
Longitude of ascending node	170.154°
Argument of perihelion	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]
Absolute magnitude (H)	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 meters in diameter with a mass of a 1.2 trillion kg. Until February 15, it had an impact probability of 1/625,000 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

• List of exceptional asteroids
• Asteroid impact avoidance
• Asteroid naming conventions