2014 RC

2014 RC
	2014 RC imaged by the Goldstone Radar on 7 September 2014
Discovery
Discovered by	CSS
Discovery site	Catalina Stn.
Discovery date	1 September 2014; (first observed only)
Designations
MPC designation	2014 RC
Minor planet category	NEO · Apollo
Orbital characteristics
	Epoch 1 July 2021 (JD 2459396.5)
	Uncertainty parameter 3
Observation arc	18 days w/Radar
Aphelion	1.8064 AU
Perihelion	0.8211 AU
Semi-major axis	1.3138 AU
Eccentricity	0.3750
Orbital period (sidereal)	1.51 yr (550 d)
Mean anomaly	155.44°
Mean motion	0° 39m 16.2s / day
Inclination	4.5687°
Longitude of ascending node	344.91°
Argument of perihelion	71.090°
Earth MOID	0.0003 AU (0.1169 LD)
Physical characteristics
Dimensions	>22 m (largest axis)
Mean diameter	~12–25 m (est.)
Synodic rotation period	0.004389 h (15.80 s)
Spectral type	S/q
Apparent magnitude	28 (Nov/Dec 2014)
Absolute magnitude (H)	26.8

2014 RC is a sub-kilometer near-Earth object and Apollo asteroid. The exceptionally fast rotator passed within 0.000267 AU (39,900 km; 24,800 mi) (0.1 lunar distances) of Earth on 7 September 2014. The asteroid is approximately the diameter of the Chelyabinsk meteor,^[5] and passed almost as close to Earth as 367943 Duende (2012 DA₁₄) did in 2013.

With an absolute magnitude of 26.8,^[4] the asteroid is about 11–25 meters (36–82 ft) in diameter depending on the albedo.^[6] Observations by the NASA Infrared Telescope Facility conclude the asteroid is a fairly bright Sq-class asteroid which have an average albedo of around 0.24, and would give the asteroid a spherical equivalent diameter of 12 meters (39 ft).^[5] Measurements by multiple telescopes indicate that the asteroid rotates in 15.8 seconds making it one of the fastest rotating asteroids so far discovered.^[5]^[8] Using the 15.8 second rotation period, more accurate radar observations by Goldstone shows the asteroid has a largest axis of at least 22 meters (72 ft).^[5] Due to the asteroid's fast rotation, it is a monolith and not a rubble pile.

On 8 September 2115 the asteroid will pass about 0.0053 AU (790,000 km; 490,000 mi) from the Moon.^[4] On 5 September 1973, the asteroid passed between 0.01052 AU (1,574,000 km; 978,000 mi) and 0.01207 AU (1,806,000 km; 1,122,000 mi) from Earth.^[4] 2014 RC was removed from the JPL Sentry Risk Table on 5 September 2014 and there are no known possible impact dates in the next 100 years.^[9]

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