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 (Online ed.). Oxford University Press. (Subscription or participating institution 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