1243 Pamela
1243 Pamela, provisional designation 1932 JE, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 70 kilometers in diameter. It was discovered on 7 May 1932, by South African astronomer Cyril Jackson at the Union Observatory in Johnannesburg. The asteroid was named for Pamela Jackson, daughter of the discoverer.
| Discovery | |
|---|---|
| Discovered by | C. Jackson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 7 May 1932 |
| Designations | |
MPC designation | (1243) Pamela |
Named after | Pamela Jackson (discoverer's daughter) |
Alternative designations | 1932 JE · 1929 XD 1934 VL · 1951 AN 1954 JO |
Minor planet category | main-belt · (outer) background |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 85.66 yr (31,287 days) |
| Aphelion | 3.2409 AU |
| Perihelion | 2.9512 AU |
Semi-major axis | 3.0960 AU |
| Eccentricity | 0.0468 |
Orbital period (sidereal) | 5.45 yr (1,990 days) |
Mean anomaly | 165.56° |
Mean motion | 0° 10m 51.24s / day |
| Inclination | 13.286° |
Longitude of ascending node | 245.68° |
| 56.586° | |
| Physical characteristics | |
| Dimensions | 66.11±23.05 km 69.883±0.420 km 69.991±1.389 km 70.06 km (derived) 70.07±5.9 km 70.25±1.00 km 70.97±20.63 km 76.42±0.67 km |
Synodic rotation period | 26.00±0.01 h 26.0±0.1 h 26±0.5 h 26.017±0.003 h |
| 0.040±0.005 0.04±0.02 0.04±0.06 0.0474 (derived) 0.048±0.002 0.0483±0.009 0.0484±0.0102 | |
| C · C (assumed) | |
| 9.60 · 9.68 · 9.70 · 9.71 · 9.90±0.29 | |
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