227 Philosophia
Philosophia (minor planet designation: 227 Philosophia) is a large main-belt asteroid that was discovered by the French astronomer Paul-Pierre Henry on August 12, 1882, in Paris and named after the topic of philosophy. Based upon photometric observations, it has a synodic rotation period of 52.98 ± 0.01 with a brightness variation of 0.15 ± 0.02 in magnitude.
3D model based on lightcurve data | |
| Discovery | |
|---|---|
| Discovered by | P.P. Henry |
| Discovery date | 12 August 1882 |
| Designations | |
MPC designation | (227) Philosophia |
| Pronunciation | /fɪloʊˈsɒfiə/ |
Named after | Philosophy |
Alternative designations | A882 PA, 1919 AA 1933 SD1, 1949 OO1 |
Minor planet category | Main belt |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 108.20 yr (39519 d) |
| Aphelion | 3.7673 AU (563.58 Gm) |
| Perihelion | 2.56007 AU (382.981 Gm) |
Semi-major axis | 3.16366 AU (473.277 Gm) |
| Eccentricity | 0.19079 |
Orbital period (sidereal) | 5.63 yr (2055.3 d) |
Average orbital speed | 16.78 km/s |
Mean anomaly | 71.2570° |
Mean motion | 0° 10m 30.554s / day |
| Inclination | 9.1539° |
Longitude of ascending node | 326.254° |
| 267.020° | |
| Physical characteristics | |
| Dimensions | 87.31±2.4 km |
Synodic rotation period | 52.98 h (2.208 d) |
| 0.0768±0.004 | |
| 9.1 | |
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