1765 Wrubel
1765 Wrubel, provisional designation 1957 XB, is a dark background asteroid from the outer regions of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 15 December 1957, by astronomers of the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States. The asteroid was named after Marshal Henry Wrubel, professor at Indiana University.
| Discovery | |
|---|---|
| Discovered by | Indiana University (Indiana Asteroid Program) |
| Discovery site | Goethe Link Obs. |
| Discovery date | 15 December 1957 |
| Designations | |
MPC designation | (1765) Wrubel |
Named after | Marshal Henry Wrubel (astronomy professor at IU) |
Alternative designations | 1957 XB · 1938 JB 1945 VA · 1949 HK1 1951 XB1 · 1955 KQ 1966 KA · A906 XA A917 XA |
Minor planet category | main-belt · (outer) |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 99.58 yr (36,371 days) |
| Aphelion | 3.7354 AU |
| Perihelion | 2.6127 AU |
Semi-major axis | 3.1741 AU |
| Eccentricity | 0.1769 |
Orbital period (sidereal) | 5.65 yr (2,065 days) |
Mean anomaly | 314.43° |
Mean motion | 0° 10m 27.48s / day |
| Inclination | 19.945° |
Longitude of ascending node | 70.185° |
| 265.28° | |
| Physical characteristics | |
| Dimensions | 37.704±0.731 km 38.299±0.226 km 42.20±0.48 km 42.33 km (SIMPS) |
Synodic rotation period | 5.260±0.002 h |
| 0.1061 (SIMPS) 0.113±0.003 0.130±0.029 0.1360±0.0153 | |
| Tholen = DX B–V = 0.750 U–B = 0.270 | |
| 9.92 · 10.06±0.12 | |
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