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.[2]

227 Philosophia

Discovery
Discovered by	P.P. Henry
Discovery date	12 August 1882
Designations
MPC designation	(227) Philosophia
Pronunciation	/fɪloʊˈsɒfiə/
Named after	Philosophy
Alternative designations	A919 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)
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	5.63 yr (2055.3 d)
Average orbital speed	16.78 km/s
Mean anomaly	71.2570°
Mean motion	0° 10^m 30.554^s / day
Inclination	9.1539°
Longitude of ascending node	326.254°
Argument of perihelion	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

References

1. Yeomans, Donald K., "227 Philosophia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
2. 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
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 227 Philosophia at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters