92 Undina
.gif) | |
| Discovery | |
|---|---|
| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | July 7, 1867 |
| Designations | |
| Main belt, Veritas family | |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 525.202 Gm (3.511 AU) |
| Perihelion | 429.240 Gm (2.869 AU) |
| 477.221 Gm (3.190 AU) | |
| Eccentricity | 0.101 |
| 2081.086 d (5.70 a) | |
Average orbital speed | 16.63 km/s |
| 117.332° | |
| Inclination | 9.922° |
| 101.830° | |
| 242.178° | |
| Physical characteristics | |
| Dimensions | 124.44 ± 3.25 km[1] |
| Mass | (4.43 ± 0.25) × 1018 kg[1] |
Mean density | 4.39 ± 0.42[1] g/cm3 |
| Albedo | 0.251 [2] |
| Temperature | ~156 K |
Spectral type | M |
| 6.61 | |
92 Undina (/ʌnˈdaɪnə/ un-DY-nə; Latin: Undīna) is a large main belt asteroid. It has an unusually high albedo and an M-type spectrum. It was discovered by C. H. F. Peters on July 7, 1867. It is named for the eponymous heroine of Undine, a popular novella by Friedrich de la Motte Fouqué. Undina is a member of the Veritas asteroid family, which formed some eight million years ago. See 490 Veritas for details.
Observations performed at the Palmer Divide Observatory in Colorado Springs, Colorado in during 2007 produced a light curve with a period of 15.941 ± 0.002 hours with a brightness range of 0.20 ± 0.02 in magnitude. This matches a 15.94 hour period reported in 1979.[3]
References
- ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- ^ Asteroid Data Sets
- ^ Warner, Brian D. (September 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory", The Minor Planet Bulletin, Bibcode:2007MPBu...34...72W.
External links
- 92 Undina at the JPL Small-Body Database
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