2153 Akiyama
| Discovery | |
|---|---|
| Discovery site | Harvard College Obs. (George R. Agassiz Station) |
| Discovery date | 1 December 1978 |
| Designations | |
| (2153) Akiyama | |
Named after | Kaoru Akiyama (Japanese astronomer) |
| 1978 XD · 1955 UQ1 1972 YA · 1973 AK3 1977 VW · 1979 FS | |
| main-belt · Themis | |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 62.66 yr (22,887 days) |
| Aphelion | 3.5985 AU |
| Perihelion | 2.6491 AU |
| 3.1238 AU | |
| Eccentricity | 0.1520 |
| 5.52 yr (2,017 days) | |
| 58.291° | |
| 0° 10m 42.6s / day | |
| Inclination | 1.1842° |
| 47.746° | |
| 31.730° | |
| Physical characteristics | |
| Dimensions | 15.42 km (calculated) 16.79±1.4 km (IRAS:2) 21.15±0.36 km |
| 12.5132±0.0053 h 12.5325±0.0053 h | |
| 0.069±0.017 0.08 (assumed) 0.1089±0.020 (IRAS:2) | |
| C | |
| 12.0 · 12.02±0.28 · 11.90 · 11.970±0.002 (R) · 11.920±0.003 (R) · 12.42 | |
2153 Akiyama, provisional designation 1978 XD, is a carbonaceous Themistian asteroid from the outer region of the asteroid belt, approximately 17 kilometers in diameter.
The asteroid was discovered by staff members at the George R. Agassiz Station of the Harvard College Observatory on 1 December 1978, and named Japanese astronomer Kaoru Akiyama.