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
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- ↑ 3.0 3.1 3.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 (Low mass estimate of Thisbe 0.074 / Mass of Ceres 4.75) * Mass of Ceres 9.43E+20 = 1.469E+19
- ↑ 5.0 5.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Asteroid Data Sets
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Observed minor planet occultation events, version of 2005 July 26
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