_Aster.png) Shape model of Aster from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 29 January 1932 |
| Designations | |
| (1218) Aster | |
| Pronunciation | /ˈæstər/[2] |
Named after | Aster (genus of flowers)[3] |
| 1932 BJ · 1978 TJ5 1978 VQ12 | |
| main-belt · (inner) | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 85.35 yr (31,173 days) |
| Aphelion | 2.5110 AU |
| Perihelion | 2.0158 AU |
| 2.2634 AU | |
| Eccentricity | 0.1094 |
| 3.41 yr (1,244 days) | |
| 56.714° | |
| 0° 17m 21.84s / day | |
| Inclination | 3.1572° |
| 63.820° | |
| 69.372° | |
| Physical characteristics | |
| Dimensions | 5.554±0.084 km[4] |
| 0.332±0.043[4] | |
| 13.2[1] | |
1218 Aster, provisional designation 1932 BJ, is a bright asteroid from the inner regions of the asteroid belt, approximately 5.5 kilometers in diameter. Discovered by Karl Reinmuth in 1932, it was later named after the flowering plant Aster.
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