77185 Cherryh
77185 Cherryh (provisional designation 2001 FE9) is a background asteroid from the central regions of the asteroid belt, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 20 March 2001, by American amateur astronomers Don Wells and Alex Cruz at the George Observatory in Needville, Texas. The dark asteroid was named for American writer C. J. Cherryh.
Orbital diagram of Cherryh | |
| Discovery | |
|---|---|
| Discovered by | D. Wells A. Cruz |
| Discovery site | George Obs. |
| Discovery date | 20 March 2001 |
| Designations | |
MPC designation | (77185) Cherryh |
Named after | C. J. Cherryh (American writer) |
Alternative designations | 2001 FE9 · 1998 TG27 |
Minor planet category | main-belt · (middle) background |
| Orbital characteristics | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 27.71 yr (10,121 d) |
| Aphelion | 3.0501 AU |
| Perihelion | 2.1431 AU |
Semi-major axis | 2.5966 AU |
| Eccentricity | 0.1746 |
Orbital period (sidereal) | 4.18 yr (1,528 d) |
Mean anomaly | 70.105° |
Mean motion | 0° 14m 8.16s / day |
| Inclination | 3.1456° |
Longitude of ascending node | 12.636° |
| 231.33° | |
| Physical characteristics | |
Mean diameter | 3.985±0.166 km |
| 0.049±0.009 | |
| 15.9 | |
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