4151 Alanhale
4151 Alanhale, provisional designation 1985 HV1, is a carbonaceous Themistian asteroid from the outer region of the asteroid belt, approximately 19 kilometers in diameter. It was discovered by the American astronomer couple Carolyn and Eugene Shoemaker at the U.S. Palomar Observatory, California, on 24 April 1985. It was named for American astronomer Alan Hale.
| Discovery | |
|---|---|
| Discovered by | C. S. Shoemaker E. M. Shoemaker |
| Discovery site | Palomar Obs. |
| Discovery date | 24 April 1985 |
| Designations | |
MPC designation | (4151) Alanhale |
Named after | Alan Hale (astronomer) |
Alternative designations | 1985 HV1 · 1968 HD 1976 SO1 · 1979 FX1 1982 SZ4 · 1985 JX |
Minor planet category | main-belt · Themis |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 48.95 yr (17,878 days) |
| Aphelion | 3.5904 AU |
| Perihelion | 2.7017 AU |
Semi-major axis | 3.1461 AU |
| Eccentricity | 0.1412 |
Orbital period (sidereal) | 5.58 yr (2,038 days) |
Mean anomaly | 346.46° |
Mean motion | 0° 10m 35.76s / day |
| Inclination | 1.0079° |
Longitude of ascending node | 67.051° |
| 75.088° | |
| Physical characteristics | |
| Dimensions | 15.37 km (calculated) 19.526±0.269 km 22.66±0.59 km |
Synodic rotation period | 11.9177±0.0047 h |
| 0.045±0.006 0.0734±0.0099 0.08 (assumed) | |
| C | |
| 11.976±0.003 (R) · 12.0 · 12.20 · 12.3 · 12.43 · 12.78±0.21 | |
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