Astronomy:(7888) 1993 UC
| Discovery[1] | |
|---|---|
| Discovered by | Robert H. McNaught |
| Discovery date | 20 October 1993 |
| Designations | |
| Minor planet category | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 9456 days (25.89 yr) |
| |{{{apsis}}}|helion}} | 4.0540 astronomical unit|AU (606.47 Gm) (Q) |
| |{{{apsis}}}|helion}} | 0.81827 AU (122.411 Gm) (q) |
| 2.4361 AU (364.44 Gm) (a) | |
| Eccentricity | 0.66411 (e) |
| Orbital period | 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° |
| 323.07° | |
| Earth MOID | 0.0889665 AU (13.30920 Gm) |
| Physical characteristics | |
| Mean diameter | ~2.7 km (1.7 mi)[2] |
Equatorial escape velocity | ~1.3 m/s (3 mph) |
| Rotation period | 2.340 h (0.0975 d)[1] |
| U | |
| Apparent magnitude | 14.1 (2013 peak)[3] |
| Absolute magnitude (H) | 15.1[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 23 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 0.089 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]
On 29 April 2146, the asteroid will pass 0.0346 AU (5,180,000 km; 3,220,000 mi) from asteroid 4 Vesta.[1]
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "JPL Close-Approach Data: 7888 (1993 UC)". https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=1993UC;cad=1#cad. 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). https://newton.spacedys.com/neodys/index.php?pc=1.1.3.1&n=7888&oc=500&y0=2013&m0=3&d0=16&h0=0&mi0=0&y1=2013&m1=4&d1=25&h1=0&mi1=0&ti=1.0&tiu=days. Retrieved 2013-03-19.
- ↑ 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 (2013-11-18). "Binary and Ternary near-Earth Asteroids detected by radar". NASA/JPL Asteroid Radar Research. http://echo.jpl.nasa.gov/~lance/binary.neas.html. Retrieved 2014-03-01.
External links
- Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
- (7888) 1993 UC at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- (7888) 1993 UC at ESA–space situational awareness
- (7888) 1993 UC at the JPL Small-Body Database
 |  |
