Astronomy:580 Selene
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Short description: Outer main-belt asteroid
| Discovery | |
|---|---|
| Discovered by | M. F. Wolf |
| Discovery site | Heidelberg |
| Discovery date | 17 December 1905 |
| Designations | |
| (580) Selene | |
| Pronunciation | /sɪˈliːniː/[1] |
| 1905 SE | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 110.29 yr (40283 d) |
| |{{{apsis}}}|helion}} | 3.4971 astronomical unit|AU (523.16 Gm) |
| |{{{apsis}}}|helion}} | 2.9628 AU (443.23 Gm) |
| 3.2300 AU (483.20 Gm) | |
| Eccentricity | 0.082713 |
| Orbital period | 5.81 yr (2120.3 d) |
| Mean anomaly | 45.310° |
| Mean motion | 0° 10m 11.244s / day |
| Inclination | 3.6614° |
| Longitude of ascending node | 99.154° |
| 334.542° | |
| Physical characteristics | |
| Mean radius | 22.895±1.6 km |
| Rotation period | 9.47 h (0.395 d) |
| Geometric albedo | 0.1218±0.019 |
| Absolute magnitude (H) | 10.3 |
Selene (minor planet designation: 580 Selene) is a minor planet orbiting the Sun in the asteroid belt. The name Selene is that of an ancient Greek goddess of the Moon.[3] The name may have been inspired by the asteroid's provisional designation 1905 SE.
This body orbits the Sun nearly midway between the orbits of Mars and Jupiter. The orbital eccentricity is slightly lower than that of Mars. Based on its light curve, Selene has an estimated rotation period of 0.3947±0.0004 days, or just under 9.5 hours.[4] During each rotation, the apparent magnitude varies by 0.27. The approximate diameter of this asteroid is 46 km.[5] (Some sources list a diameter of up to 56 km.) The albedo is about 7%, comparable to that of the Earth's Moon.
References
- ↑ "Selene". Selene. Oxford University Press. http://www.lexico.com/definition/Selene.
- ↑ "580 Selene (1905 SE)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=580;cad=1.
- ↑ Schmadel, Lutz D. (2003). "(580) Selene". Dictionary of Minor Planet Names – (580) Selene. Springer Berlin Heidelberg. p. 160. doi:10.1007/978-3-540-29925-7_581. ISBN 978-3-540-29925-7.
- ↑ Antonini, Pierre (2005-05-16). "Courbes de rotation d'astéroïdes et de comètes" (in fr). Observatoire de Genève. http://obswww.unige.ch/~behrend/page2cou.html#000580.
- ↑ "Occultation by (580) Selene". RASNZ Occultation Section. 2005-01-18. http://occsec.wellington.net.nz/planet/2005/updates/050209_580_2964_u.htm.
External links
- 580 Selene at AstDyS-2, Asteroids—Dynamic Site
- 580 Selene at the JPL Small-Body Database
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