134 Sophrosyne
| Discovery | |
|---|---|
| Discovered by | Karl Theodor Robert Luther |
| Discovery date | September 27, 1873 |
| Designations | |
Named after | Sophrosyne |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 428.174 Gm (2.862 AU) |
| Perihelion | 338.780 Gm (2.265 AU) |
| 383.477 Gm (2.563 AU) | |
| Eccentricity | 0.117 |
| 1499.059 d (4.10 a) | |
Average orbital speed | 18.54 km/s |
| 110.425° | |
| Inclination | 11.588° |
| 346.213° | |
| 83.723° | |
| Physical characteristics | |
| Dimensions | 112.188 km[2] |
| Mass | 2.0×1018 kg |
| 0.0345 m/s² | |
| 0.0652 km/s | |
| Albedo | 0.0436 ± 0.0122[2] |
| Temperature | ~174 K |
Spectral type | C (Tholen)[2] |
| 8.770[2] | |
134 Sophrosyne is a large main-belt asteroid that was discovered by German astronomer Robert Luther on September 27, 1873, and was named after the concept of sophrosyne, Plato's term for 'moderation'. Classified as a C-type asteroid, it has an exceedingly dark surface and most probably a primitive carbonaceous composition.
An occultation of a star by 134 Sophrosyne was observed November 24, 1980, in the United States. Timing information from this event allowed a diameter estimate of 110 km to be derived.[3]
References
- ^ Yeomans, Donald K., "134 Sophrosyne", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 2013-03-25.
- ^ a b c d Pravec, P.; et al. (May 2012), "Absolute Magnitudes of Asteroids and a Revision of Asteroid Albedo Estimates from WISE Thermal Observations", Asteroids, Comets, Meteors 2012, Proceedings of the conference held May 16–20, 2012 in Niigata, Japan, no. 1667, Bibcode:2012LPICo1667.6089P.
- ^ Taylor, G. E., "Progress in accurate determinations of diameters of minor planets", Asteroids, comets, meteors; Proceedings of the Meeting, Uppsala, Sweden, June 20–22, 1983, pp. 107–109, Bibcode:1983acm..proc..107T.
External links
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