285 Regina

Regina (minor planet designation: 285 Regina) is a typical, although fairly large, Main belt asteroid.[2] It was discovered by Auguste Charlois on 3 August 1889 in Nice, France.

285 Regina

Discovery
Discovered by	Auguste Charlois
Discovery date	3 August 1889
Designations
MPC designation	(285) Regina
Pronunciation	/rɪˈdʒaɪnə/[1]
Minor planet category	Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	104.63 yr (38215 d)
Aphelion	3.72130 AU (556.699 Gm)
Perihelion	2.44540 AU (365.827 Gm)
Semi-major axis	3.08335 AU (461.263 Gm)
Eccentricity	0.20690
Orbital period	5.41 yr (1977.6 d)
Average orbital speed	16.97 km/s
Mean anomaly	137.349°
Mean motion	0° 10^m 55.348^s / day
Inclination	17.6192°
Longitude of ascending node	311.385°
Argument of perihelion	14.4439°
Physical characteristics
Dimensions	45.13±2.2 km
Rotation period	9.542 h (0.3976 d)
Geometric albedo	0.0547±0.006
Temperature	unknown
Absolute magnitude (H)	10.7

References

1. "Regina". Oxford English Dictionary (3rd ed.). Oxford University Press. September 2005. (Subscription or UK public library membership required.)
2. "285 Regina". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.

External links

• 285 Regina at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 285 Regina at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters