2285 Ron Helin
2285 Ron Helin, provisional designation 1976 QB, is a stony Florian asteroid from the inner region of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 27 August 1976, by American astronomer Schelte Bus at Palomar Observatory in San Diego County, California.
| Discovery | |
|---|---|
| Discovered by | S. J. Bus |
| Discovery site | Palomar Obs. |
| Discovery date | 27 August 1976 |
| Designations | |
MPC designation | (2285) Ron Helin |
Named after | Ronald P. Helin husband of astronomer Eleanor F. Helin |
Alternative designations | 1976 QB |
Minor planet category | main-belt · Flora |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 40.54 yr (14,807 days) |
| Aphelion | 2.6815 AU |
| Perihelion | 1.7578 AU |
Semi-major axis | 2.2197 AU |
| Eccentricity | 0.2081 |
Orbital period (sidereal) | 3.31 yr (1,208 days) |
Mean anomaly | 139.05° |
Mean motion | 0° 17m 52.8s / day |
| Inclination | 5.3339° |
Longitude of ascending node | 157.85° |
| 182.81° | |
| Physical characteristics | |
| Dimensions | 4.11 km (calculated) |
Synodic rotation period | 12 h |
| 0.24 (assumed) | |
| S | |
| 14.0 · 14.1 | |
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