 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 3 August 1889 |
| Designations | |
| MPC designation | (285) Regina |
| Pronunciation | /rɪˈdʒaɪnə/ rij-EYE-nə |
| Alternative designations | A889 PA, 1911 QJ 1951 AC1 |
| Minor planet category | Main belt |
| Orbital characteristics | |
| 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 (sidereal) | 5.41 yr (1977.6 d) |
| Average orbital speed | 16.97 km/s |
| Mean anomaly | 137.349° |
| Mean motion | 0° 10 55.348 / day |
| Inclination | 17.6192° |
| Longitude of ascending node | 311.385° |
| Argument of perihelion | 14.4439° |
| Physical characteristics | |
| Dimensions | 45.13±2.2 km |
| Synodic rotation period | 9.542 h (0.3976 d) |
| Geometric albedo | 0.0547±0.006 |
| Temperature | unknown |
| Absolute magnitude (H) | 10.7 |
285 Regina is a typical, although fairly large, Main belt asteroid. It was discovered by Auguste Charlois on 3 August 1889 in Nice, France. The asteroid is a suspected interloper in the Eucharis asteroid family.
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.
References
- "Regina". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
- ^ "285 Regina". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.
- 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.
- 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.
External links
- 285 Regina at AstDyS-2, Asteroids—Dynamic Site
- 285 Regina at the JPL Small-Body Database
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