1064 Aethusa
1064 Aethusa, provisional designation 1926 PA, is a stony background asteroid from the central regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 2 August 1926, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the plant Aethusa cynapium (fool's parsley).
| Discovery | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 2 August 1926 |
| Designations | |
MPC designation | (1064) Aethusa |
| Pronunciation | /iːˈθjuːsə/ |
Named after | Aethusa cynapium (fool's parsley) |
Alternative designations | 1926 PA · 1962 HF |
Minor planet category | main-belt · (middle) |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 90.66 yr (33,112 days) |
| Aphelion | 2.9930 AU |
| Perihelion | 2.0917 AU |
Semi-major axis | 2.5424 AU |
| Eccentricity | 0.1773 |
Orbital period (sidereal) | 4.05 yr (1,481 days) |
Mean anomaly | 165.59° |
Mean motion | 0° 14m 35.16s / day |
| Inclination | 9.5020° |
Longitude of ascending node | 280.57° |
| 20.515° | |
| Physical characteristics | |
| Dimensions | 17.42±3.60 km 18.56 km (derived) 18.66±0.9 km 19.77±0.36 km 20.007±0.173 km 22.377±0.131 km 25.361±4.376 km |
Synodic rotation period | 8.621±0.004 h 12.916±0.002 h |
| 0.160±0.087 0.2282±0.0133 0.27±0.12 0.278±0.046 0.288±0.012 0.2952 (derived) 0.3202±0.034 | |
| S | |
| 10.50 · 10.6 · 10.75±0.20 · 10.88 | |
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