1282 Utopia
1282 Utopia /juːˈtoʊpiə/ is a dark asteroid from the outer regions of the asteroid belt, approximately 55 kilometers in diameter. It was discovered on 17 August 1933, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg, and given the provisional designation 1933 QM1. The asteroid was named after the fictional island of Utopia.
| Discovery | |
|---|---|
| Discovered by | C. Jackson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 17 August 1933 |
| Designations | |
MPC designation | (1282) Utopia |
| Pronunciation | /juːˈtoʊpiə/ |
Named after | Utopia (fictional island society) |
Alternative designations | 1933 QM1 · 1930 CA 1933 QB1 · 1933 RF 1939 RB · 1955 SO1 |
Minor planet category | main-belt · (outer) background |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.09 yr (30,715 days) |
| Aphelion | 3.5049 AU |
| Perihelion | 2.7293 AU |
Semi-major axis | 3.1171 AU |
| Eccentricity | 0.1244 |
Orbital period (sidereal) | 5.50 yr (2,010 days) |
Mean anomaly | 23.825° |
Mean motion | 0° 10m 44.76s / day |
| Inclination | 18.040° |
Longitude of ascending node | 324.31° |
| 79.265° | |
| Physical characteristics | |
| Dimensions | 52.91 km (derived) 53.07±3.7 km 54.48±19.56 km 57.702±0.300 km 58.77±0.72 km 64.414±0.843 km 64.71±0.58 km |
Synodic rotation period | 13.60±0.05 h 13.61±0.01 h 13.6228±0.0005 h 13.623±0.002 h |
| 0.035±0.008 0.04±0.05 0.0426±0.0086 0.0479 (derived) 0.052±0.002 0.053±0.007 0.0627±0.010 | |
| P · C (assumed) | |
| 10.00 · 10.20 · 10.27 · 10.3 | |
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