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. The asteroid is a suspected interloper in the Eucharis asteroid family.[3]

285 Regina
Orbital diagram
Discovery
Discovered byAuguste Charlois
Discovery date3 August 1889
Designations
(285) Regina
Pronunciation/rɪˈnə/ rij-EYE-nə[1]
A889 PA, 1911 QJ
1951 AC1
Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc104.63 yr (38215 d)
Aphelion3.72130 AU (556.699 Gm)
Perihelion2.44540 AU (365.827 Gm)
3.08335 AU (461.263 Gm)
Eccentricity0.20690
5.41 yr (1977.6 d)
16.97 km/s
137.349°
0° 10m 55.348s / day
Inclination17.6192°
311.385°
14.4439°
Physical characteristics
Dimensions45.13±2.2 km
9.542 h (0.3976 d)
0.0547±0.006
Temperatureunknown
10.7

Analysis of the asteroid light curve generated from photometric data collected during 2008 show a rotation period of 9.542±0.001 h with a brightness variation of 0.16±0.03 in magnitude.[4]

References

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  1. ^ "Regina". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
  2. ^ a b "285 Regina". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.
  3. ^ Novaković, Bojan; et al. (November 2011), "Families among high-inclination asteroids", Icarus, 216 (1): 69–81, arXiv:1108.3740, Bibcode:2011Icar..216...69N, doi:10.1016/j.icarus.2011.08.016.
  4. ^ Pilcher, Frederick (April 2010), "Rotation Period Determination for 285 Regina", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, vol. 37, no. 2, p. 50, Bibcode:2010MPBu...37...50P.
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