88 Thisbe
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A three-dimensional model of 88 Thisbe based on its light curve. | |
| Discovery | |
|---|---|
| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | June 15, 1866 |
| Designations | |
| Pronunciation | /ˈθɪzbiː/ THIZ-bee |
Named after | Thisbē |
| Main belt | |
| Adjectives | Thisbean |
| Orbital characteristics[1] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 482.242 Gm (3.224 AU) |
| Perihelion | 345.809 Gm (2.312 AU) |
| 414.025 Gm (2.768 AU) | |
| Eccentricity | 0.165 |
| 1681.709 d (4.60 a) | |
Average orbital speed | 17.78 km/s |
| 165.454° | |
| Inclination | 5.219° |
| 276.765° | |
| 36.591° | |
| Physical characteristics | |
| Dimensions |
(255×232×193)±12 km[2] 225 km (mean) 232 km (Dunham)[1] |
| Mass |
1.83×1019 kg[2] 1.5×1019 kg[3][4] |
Mean density | 3.06±0.52 g/cm³[2] |
| 0.0561 m/s² | |
| 0.1061 km/s | |
| 6.04[5] h | |
| Albedo | 0.067[1][6] |
| Temperature | ~167 K |
Spectral type | B[1] |
| 7.04[1] | |
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88 Thisbe (/ˈθɪzbiː/ THIZ-bee) is the 13th largest main-belt asteroids. It was discovered by C. H. F. Peters on June 15, 1866, and named after Thisbe, heroine of a Roman fable. An occultation of a star by Thisbe was observed on October 7, 1981. Results from the occultation indicate a larger than expected diameter of 232 km.[7][8]
During 2000, 88 Thisbe was observed by radar from the Arecibo Observatory. The return signal matched an effective diameter of 207 ± 22 km. This is consistent with the asteroid dimensions computed through other means.[9]
Photometric observations of this asteroid during 1977 gave a light curve with a period of 6.0422 ± 0.006 hours and a brightness variation of 0.19 in magnitude.[5]
Perturbation
Thisbe has been perturbed by asteroid 7 Iris and in 2001 Michalak estimated it to have a mass of 1.5×1019 kg.[3][4] But Iris is strongly perturbed by many minor planets such as 10 Hygiea and 15 Eunomia.[3]
In 2008, Baer estimated Thisbe to have a mass of 1.05×1019 kg.[2] In 2011 Baer revised this to 1.83×1019 kg with an uncertainty of 1.09×1018 kg.[2]
References
- 1 2 3 4 5 Yeomans, Donald K., "88 Thisbe", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25.
- 1 2 3 4 5 Jim Baer (2011). "Recent Asteroid Mass Determinations". Personal Website. Retrieved 2012-04-12.
- 1 2 3 Michalak, G. (2001). "Determination of asteroid masses". Astronomy & Astrophysics 374 (2): 703–711. Bibcode:2001A&A...374..703M. doi:10.1051/0004-6361:20010731. Retrieved 2008-11-06.
- 1 2 (Low mass estimate of Thisbe 0.074 / Mass of Ceres 4.75) * Mass of Ceres 9.43E+20 = 1.469E+19
- 1 2 Schober, H. J.; et al. (April 1979), "Photoelectric photometry and rotation periods of three large and dark asteroids - 49 Pales, 88 Thisbe and 92 Undina", Astronomy and Astrophysics, Supplement Series 36, pp. 1–8, Bibcode:1979A&AS...36....1S.
- ↑ Asteroid Data Sets
- ↑ 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.
- ↑ Observed minor planet occultation events, version of 2005 July 26
- ↑ Magri, Christopher; et al. (January 2007), "A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999–2003", Icarus 186 (1): 126–151, Bibcode:2007Icar..186..126M, doi:10.1016/j.icarus.2006.08.018
External links
- 88 Thisbe at the JPL Small-Body Database
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