(7888) 1993 UC

(7888) 1993 UC
Discovery
Discovered by	Robert H. McNaught
Discovery date	20 October 1993
Designations
Minor planet category	Apollo; NEO;
Orbital characteristics
	Epoch 13 January 2016 (JD 2457400.5)
	Uncertainty parameter 0
Observation arc	9456 days (25.89 yr)
Aphelion	4.0540 AU (606.47 Gm) (Q)
Perihelion	0.81827 AU (122.411 Gm) (q)
Semi-major axis	2.4361 AU (364.44 Gm) (a)
Eccentricity	0.66411 (e)
Orbital period (sidereal)	3.80 yr (1388.8 d)
Mean anomaly	274.28°
Mean motion	0° 15m 33.156s / day
Inclination	26.082°
Longitude of ascending node	165.92°
Argument of perihelion	323.07°
Earth MOID	0.0889665 AU (13.30920 Gm)
Physical characteristics
Mean diameter	~2.7 km (1.7 mi)
Equatorial escape velocity	~1.3 m/s (3 mph)
Synodic rotation period	2.340 h (0.0975 d)
Spectral type	U
Apparent magnitude	14.1 (2013 peak)
Absolute magnitude (H)	15.1

(7888) 1993 UC is a near-Earth minor planet in the Apollo group.^[1] It was discovered by Robert H. McNaught at the Siding Spring Observatory in Coonabarabran, New South Wales, Australia, on 20 October 1993.^[1] The asteroid has an observation arc of 34 years and has a well determined orbit.^[1] Its estimated size is 2.3 to 5.2 km.^[4]

On 20 March 2013, the asteroid passed 49 lunar distances or 0.12598 AU (18,846,000 km; 11,711,000 mi) from Earth at a relative velocity of 21.8 km/s (49,000 mph).^[1] The approach posed no threat to Earth. (7888) 1993 UC is not classified as a potentially hazardous asteroid (PHA) because its Earth MOID (Minimum Orbit Intersection Distance) is only 0.084 AU,^[1] and only objects with an Earth MOID less than 0.05 AU are considered PHAs.^[5]

It was discovered to be a binary asteroid by Arecibo Observatory in March 2013.^[6]

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j "JPL Close-Approach Data: 7888 (1993 UC)". Retrieved 11 April 2016. 2012-11-25 last obs (arc=23 years)
^ (E.A.R.N.) physical data for (7888) 1993UC
^ "1993 UC Ephemerides for 20 March 2013". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 19 March 2013.
^ NASA "NEO Earth Close Approach Tables", Retrieved on 21 December 2012.
^ NASA/JPL "NEO Program FAQ", Retrieved on 21 December 2012.
^ Dr. Lance A. M. Benner (18 November 2013). "Binary and Ternary near-Earth Asteroids detected by radar". NASA/JPL Asteroid Radar Research. Archived from the original on 8 June 2004. Retrieved 1 March 2014.

External links

Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
(7888) 1993 UC at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
(7888) 1993 UC at ESA–space situational awareness
- Ephemerides · Observations · Orbit · Physical properties · Summary
(7888) 1993 UC at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

[jpldata-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j "JPL Close-Approach Data: 7888 (1993 UC)". Retrieved 11 April 2016. 2012-11-25 last obs (arc=23 years)

[2] (E.A.R.N.) physical data for (7888) 1993UC

[NEODyS2013-3] "1993 UC Ephemerides for 20 March 2013". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 19 March 2013.

[4] NASA "NEO Earth Close Approach Tables", Retrieved on 21 December 2012.

[5] NASA/JPL "NEO Program FAQ", Retrieved on 21 December 2012.

[Binary-6] Dr. Lance A. M. Benner (18 November 2013). "Binary and Ternary near-Earth Asteroids detected by radar". NASA/JPL Asteroid Radar Research. Archived from the original on 8 June 2004. Retrieved 1 March 2014.

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