2009 RR

2009 RR
Discovery
Discovered by	Catalina Sky Survey (703)
Discovery date	11 September 2009
Designations
Designation	2009 RR
Minor planet category	NEO; Apollo;
Orbital characteristics
	Epoch 13 January 2016 (JD 2457400.5)
	Uncertainty parameter 7
Observation arc	4 days (last seen 2009)
Aphelion	2.0753 AU (310.46 Gm)
Perihelion	0.75416 AU (112.821 Gm)
Semi-major axis	1.4147 AU (211.64 Gm)
Eccentricity	0.46693
Orbital period (sidereal)	1.68 yr (614.63 d)
Mean anomaly	252.65°
Mean motion	0° 35m 8.592s /day (n)
Inclination	6.1464°
Longitude of ascending node	174.21°
Argument of perihelion	256.21°
Earth MOID	0.0028846 AU (431,530 km)
Physical characteristics
Dimensions	~26 meters (85 ft); 20–45 meters[citation needed];
Mass	2.4×107 kg (assumed)
Absolute magnitude (H)	25.5

2009 RR micro-asteroid, classified as near-Earth object of the Apollo group.^[2] It was discovered on 11 September 2009 by the Catalina Sky Survey at an apparent magnitude of 19.5 using a 0.68-meter (27 in) Schmidt–Cassegrain telescope.^[1] 2009 RR was the only asteroid discovered before 2014 that was predicted to potentially pass inside the orbit of the Moon during 2014. The asteroid has an estimated diameter of 26 meters (85 ft) and is listed on the Sentry Risk Table.^[3] It is not large enough to qualify as a potentially hazardous object.

^ ^a ^b Cite error: The named reference MPEC2009-R39 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d Cite error: The named reference jpldata was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference summary was invoked but never defined (see the help page).