2391 Tomita
| Discovery | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 9 January 1957 |
| Designations | |
| (2391) Tomita | |
Named after | Kōichirō Tomita (Japanese astronomer) |
| 1957 AA · 1929 VX 1938 BF · 1942 DF 1957 BA · 1977 KM 1978 PA4 · 1980 DC6 | |
| main-belt · Nysa | |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 87.07 yr (31,804 days) |
| Aphelion | 2.7676 AU |
| Perihelion | 2.1141 AU |
| 2.4408 AU | |
| Eccentricity | 0.1339 |
| 3.81 yr (1,393 days) | |
| 345.07° | |
| 0° 15m 30.6s / day | |
| Inclination | 3.0111° |
| 163.32° | |
| 282.65° | |
| Physical characteristics | |
| Dimensions | 9.17 km (calculated) 15.07±4.33 km 15.20±3.74 km 16.62±0.23 km 17.941±0.129 19.412±0.175 km |
| 7.9533±0.0005 h 8.435±0.079 h | |
| 0.0321±0.0044 0.06±0.03 0.070±0.004 0.07±0.07 0.21 (assumed) | |
| S · C | |
| 12.4 · 12.5 · 12.66 · 12.74±0.28 | |
2391 Tomita, provisional designation 1957 AA, is a Nysian asteroid from the inner regions of the asteroid belt, approximately 15 kilometers in diameter. The asteroid was discovered on 9 January 1957, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany. It was named after Japanese astronomer Kōichirō Tomita.