4217 Engelhardt
| Discovery | |
|---|---|
| Discovered by | C. Shoemaker |
| Discovery site | Palomar Obs. |
| Discovery date | 24 January 1988 |
| Designations | |
| (4217) Engelhardt | |
Named after | Wolf von Engelhardt (German mineralogist) |
| 1988 BO2 · 1944 RL 1951 RY1 · 1970 AA | |
| main-belt · Phocaea | |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 72.73 yr (26,563 days) |
| Aphelion | 2.8045 AU |
| Perihelion | 1.8246 AU |
| 2.3145 AU | |
| Eccentricity | 0.2117 |
| 3.52 yr (1,286 days) | |
| 272.23° | |
| 0° 16m 47.64s / day | |
| Inclination | 23.129° |
| 355.44° | |
| 348.79° | |
| Known satellites | 1 (P: 36.03 h) |
| Physical characteristics | |
| Dimensions | 7.34±1.36 km 8.742±0.356 km 9.16±1.0 km 9.24 km (derived) |
| 3.066±0.001 h 3.0661±0.0002 h | |
| 0.2108±0.052 0.231±0.046 0.2489 (derived) 0.37±0.17 | |
| S | |
| 12.10±0.67 · 12.20 · 12.3 · 12.50 | |
4217 Engelhardt, provisional designation 1988 BO2, is a stony Phocean asteroid and a potentially binary system from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 24 January 1988, by American astronomer Carolyn Shoemaker at Palomar Observatory in California, and later named after German mineralogist Wolf von Engelhardt.