Astronomy:285 Regina
From HandWiki
Short description: Main-belt asteroid
 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 3 August 1889 |
| Designations | |
| (285) Regina | |
| Pronunciation | /rɪˈdʒaɪnə/ rij-EYE-nə[1] |
| A889 PA, 1911 QJ 1951 AC1 | |
| 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) |
| |{{{apsis}}}|helion}} | 3.72130 astronomical unit|AU (556.699 Gm) |
| |{{{apsis}}}|helion}} | 2.44540 AU (365.827 Gm) |
| 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° 10m 55.348s / day |
| Inclination | 17.6192° |
| Longitude of ascending node | 311.385° |
| 14.4439° | |
| Physical characteristics | |
| Dimensions | 45.13±2.2 km |
| Rotation period | 9.542 h (0.3976 d) |
| Geometric albedo | 0.0547±0.006 |
| Physics | unknown |
| Absolute magnitude (H) | 10.7 |
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. The asteroid is a suspected interloper in the Eucharis asteroid family.[3]
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
- ↑ Regina (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=Regina (Subscription or UK public library membership required.)
- ↑ 2.0 2.1 "285 Regina". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=285.
- ↑ Novaković, Bojan et al. (November 2011), "Families among high-inclination asteroids", Icarus 216 (1): 69–81, doi:10.1016/j.icarus.2011.08.016, Bibcode: 2011Icar..216...69N.
- ↑ Pilcher, Frederick (April 2010), "Rotation Period Determination for 285 Regina", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 37 (2): pp. 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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