134 Sophrosyne
| Discovery | |
|---|---|
| Discovered by | Karl Theodor Robert Luther |
| Discovery date | 27 September 1873 |
| Designations | |
Named after | Sophrosyne |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 138.60 yr (50625 d) |
| Aphelion | 2.86280 AU (428.269 Gm) |
| Perihelion | 2.26311 AU (338.556 Gm) |
| 2.56295 AU (383.412 Gm) | |
| Eccentricity | 0.11699 |
| 4.10 yr (1498.7 d) | |
Average orbital speed | 18.54 km/s |
| 229.885° | |
| 0° 14m 24.76s / day | |
| Inclination | 11.6018° |
| 345.986° | |
| 84.7156° | |
| Earth MOID | 1.31034 AU (196.024 Gm) |
| Jupiter MOID | 2.42537 AU (362.830 Gm) |
| TJupiter | 3.396 |
| Physical characteristics | |
| Dimensions | 108[1] 112.188 km[2] |
| Mass | 2.0×1018 kg |
Equatorial surface gravity | 0.0345 m/s² |
Equatorial escape velocity | 0.0652 km/s |
| 17.196 h (0.7165 d) | |
| 0.0364±0.001[1] 0.0436 ± 0.0122[2] | |
| Temperature | ~174 K |
| C (Tholen)[2] | |
| 8.76,[1] 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
- ^ a b c d Yeomans, Donald K., "134 Sophrosyne", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- ^ 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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