2145 Blaauw
2145 Blaauw, provisional designation 1976 UF, is a dark Ursula asteroid from the outer regions of the asteroid belt, approximately 38 kilometers in diameter. It was discovered on 24 October 1976, by astronomer Richard Martin West at the La Silla Observatory in northern Chile. The asteroid was named after Dutch astronomer Adriaan Blaauw.
| Discovery | |
|---|---|
| Discovered by | R. M. West |
| Discovery site | La Silla Obs. |
| Discovery date | 24 October 1976 |
| Designations | |
MPC designation | (2145) Blaauw |
Named after | Adriaan Blaauw (Dutch astronomer) |
Alternative designations | 1976 UF · 1929 XS 1963 RK · 1980 TW |
Minor planet category | main-belt · (outer) Ursula |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 41.02 yr (14,983 days) |
| Aphelion | 3.5269 AU |
| Perihelion | 2.9059 AU |
Semi-major axis | 3.2164 AU |
| Eccentricity | 0.0965 |
Orbital period (sidereal) | 5.77 yr (2,107 days) |
Mean anomaly | 314.16° |
Mean motion | 0° 10m 15.24s / day |
| Inclination | 15.013° |
Longitude of ascending node | 264.34° |
| 279.04° | |
| Physical characteristics | |
| Dimensions | 34.06 km (derived) 37.11±0.53 km 38.00±10.68 km 40.549±0.848 km 40.55±0.85 km |
Synodic rotation period | 12.141±0.003 h |
| 0.051±0.011 0.06±0.04 0.0665 (derived) 0.076±0.002 | |
| C (assumed) | |
| 10.60 · 10.80 · 10.83±0.34 · 10.9 | |
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