1182 Ilona
1182 Ilona, provisional designation 1927 EA, is a stony asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at the Heidelberg Observatory on 3 March 1927, and later named Ilona. Any reference to its name is unknown.
Modelled shape of Ilona from its lightcurve | |
| Discovery | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 3 March 1927 |
| Designations | |
MPC designation | (1182) Ilona |
Named after | unknown |
Alternative designations | 1927 EA · A915 RD |
Minor planet category | main-belt · (inner) |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 90.33 yr (32,993 days) |
| Aphelion | 2.5261 AU |
| Perihelion | 1.9930 AU |
Semi-major axis | 2.2596 AU |
| Eccentricity | 0.1180 |
Orbital period (sidereal) | 3.40 yr (1,241 days) |
Mean anomaly | 328.01° |
Mean motion | 0° 17m 24.72s / day |
| Inclination | 9.3881° |
Longitude of ascending node | 336.38° |
| 63.035° | |
| Physical characteristics | |
| Dimensions | 12.67±2.95 km 13.29±2.48 km 13.448±0.074 km 14.09 km (derived) 14.162±0.257 14.26±0.8 km 17.88±0.62 km |
Synodic rotation period | 14.938±0.005 h 29.8±0.1 h 29.853±0.0627 h |
| 0.175±0.014 0.2039 (derived) 0.22±0.11 0.221±0.016 0.2624±0.030 0.29±0.13 0.2957±0.0367 | |
| S | |
| 11.04±0.96 · 11.3 · 11.50 · 11.536±0.004 (R) · 11.6 · 11.77 | |
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