Astronomy:227 Philosophia
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Short description: Main-belt asteroid
_Philosophia.png) 3D model based on lightcurve data | |
| Discovery | |
|---|---|
| Discovered by | P.P. Henry |
| Discovery date | 12 August 1882 |
| Designations | |
| (227) Philosophia | |
| Pronunciation | /fɪloʊˈsɒfiə/ |
| Named after | Philosophy |
| A882 PA, 1919 AA 1933 SD1, 1949 OO1 | |
| Minor planet category | Main belt |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 108.20 yr (39519 d) |
| |{{{apsis}}}|helion}} | 3.7673 astronomical unit|AU (563.58 Gm) |
| |{{{apsis}}}|helion}} | 2.56007 AU (382.981 Gm) |
| 3.16366 AU (473.277 Gm) | |
| Eccentricity | 0.19079 |
| Orbital period | 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 |
| Rotation period | 52.98 h (2.208 d) |
| Geometric albedo | 0.0768±0.004 |
| Absolute magnitude (H) | 9.1 |
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.[2]
References
- ↑ Yeomans, Donald K., "227 Philosophia", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=227, retrieved 12 May 2016.
- ↑ Pilcher, Frederick; Alkema, Michael S. (July 2014), "Rotation Period Determination for 227 Philosophia", The Minor Planet Bulletin 41 (3): 188–189, Bibcode: 2014MPBu...41..188P.
External links
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- 227 Philosophia at AstDyS-2, Asteroids—Dynamic Site
- 227 Philosophia at the JPL Small-Body Database
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