1215 Boyer
1215 Boyer, provisional designation 1932 BA, is a stony Eunomian asteroid from the central region of the asteroid belt, approximately 20 kilometers in diameter. It was discovered by astronomer Alfred Schmitt in 1932, who named it after French astronomer and college Louis Boyer.
| Discovery | |
|---|---|
| Discovered by | A. Schmitt |
| Discovery site | Algiers Obs. |
| Discovery date | 19 January 1932 |
| Designations | |
MPC designation | (1215) Boyer |
Named after | Louis Boyer (French astronomer) |
Alternative designations | 1932 BA |
Minor planet category | main-belt · (middle) Eunomia · Maria |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 85.46 yr (31,214 days) |
| Aphelion | 2.9213 AU |
| Perihelion | 2.2352 AU |
Semi-major axis | 2.5783 AU |
| Eccentricity | 0.1331 |
Orbital period (sidereal) | 4.14 yr (1,512 days) |
Mean anomaly | 324.91° |
Mean motion | 0° 14m 17.16s / day |
| Inclination | 15.915° |
Longitude of ascending node | 123.74° |
| 266.02° | |
| Physical characteristics | |
| Dimensions | 13.041±0.106 km 14.705±0.091 km 17.47 km (calculated) 20.68±0.79 km 23.06±4.95 km 24.65±0.36 km |
Synodic rotation period | 10.36±0.05 h |
| 0.116±0.022 0.147±0.013 0.17±0.08 0.21 (assumed) 0.3012±0.1397 | |
| Tholen = S · S B–V = 0.900 U–B = 0.459 | |
| 11.00 11.1 11.14 11.53±0.15 | |
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