1194 Aletta
1194 Aletta, provisional designation 1931 JG, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 55 kilometers in diameter. It was discovered on 13 May 1931, by South African astronomer Cyril Jackson at Johannesburg Observatory in South Africa. It was later named after the discoverer's wife Aletta Jackson.
| Discovery | |
|---|---|
| Discovered by | C. Jackson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 13 May 1931 |
| Designations | |
MPC designation | (1194) Aletta |
Named after | Aletta Jackson (discoverer's wife) |
Alternative designations | 1931 JG · 1946 KC 1962 SB |
Minor planet category | main-belt · (outer) |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 85.07 yr (31,072 days) |
| Aphelion | 3.1812 AU |
| Perihelion | 2.6452 AU |
Semi-major axis | 2.9132 AU |
| Eccentricity | 0.0920 |
Orbital period (sidereal) | 4.97 yr (1,816 days) |
Mean anomaly | 138.73° |
Mean motion | 0° 11m 53.52s / day |
| Inclination | 10.870° |
Longitude of ascending node | 291.32° |
| 243.18° | |
| Physical characteristics | |
| Dimensions | 41.358±0.191 km 42.67±0.77 km 46.371±1.188 km 55.22±20.92 km 55.23 km (derived) 55.39±1.4 km |
Synodic rotation period | 19.7±0.1 h 20.39±0.01 h 20.3903±0.2170 h |
| 0.03±0.03 0.0333 (derived) 0.0375±0.0065 0.0479±0.003 0.085±0.004 0.087±0.011 | |
| C | |
| 10.2 · 10.5 · 10.6 · 10.644±0.001 (R) | |
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