1431 Luanda
1431 Luanda, provisional designation 1937 OB, is a stony Eunomian asteroid from the central regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered on 29 July 1937, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named after the city of Luanda.
Modelled shape of Luanda from its lightcurve | |
| Discovery | |
|---|---|
| Discovered by | C. Jackson |
| Discovery site | Johannesburg |
| Discovery date | 29 July 1937 |
| Designations | |
MPC designation | (1431) Luanda |
Named after | Luanda (Capital of Angola) |
Alternative designations | 1937 OB · 1949 KZ |
Minor planet category | main-belt · (middle) Eunomia |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 80.22 yr (29,300 days) |
| Aphelion | 3.0989 AU |
| Perihelion | 2.1408 AU |
Semi-major axis | 2.6199 AU |
| Eccentricity | 0.1829 |
Orbital period (sidereal) | 4.24 yr (1,549 days) |
Mean anomaly | 293.57° |
Mean motion | 0° 13m 56.64s / day |
| Inclination | 13.987° |
Longitude of ascending node | 117.73° |
| 224.19° | |
| Physical characteristics | |
| Dimensions | 13.608±1.966 km 13.88 km (calculated) |
Synodic rotation period | 4.141±0.004 h 5.360±0.002 h |
| 0.21 (assumed) 0.360±0.347 | |
| LS · S (assumed) | |
| 11.06 · 11.6 · 11.7 · 12.38±0.42 | |
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