1236 Thaïs
| Discovery [1] | |
|---|---|
| Discovered by | G. Neujmin |
| Discovery site | Simeiz Observatory |
| Discovery date | 6 November 1931 |
| Designations | |
| MPC designation | 1236 Thais |
Named after |
Thaïs (ancient Greek hetaira)[2] |
|
1931 VX · 1957 LQ 1964 JH · 1965 WA | |
| main-belt · (inner) [3] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.44 yr (30841 days) |
| Aphelion | 3.0194 AU (451.70 Gm) |
| Perihelion | 1.8442 AU (275.89 Gm) |
| 2.4318 AU (363.79 Gm) | |
| Eccentricity | 0.24163 |
| 3.79 yr (1385.2 d) | |
| 164.65° | |
| 0° 15m 35.64s / day | |
| Inclination | 13.160° |
| 48.663° | |
| 305.78° | |
| Earth MOID | 0.873848 AU (130.7258 Gm) |
| Jupiter MOID | 2.50757 AU (375.127 Gm) |
| Jupiter Tisserand parameter | 3.432 |
| Physical characteristics | |
| Dimensions |
22.34 km[4] 20.07±0.41 km[5] 19.163±1.790 km[6] |
Mean radius | 11.17±0.65 km |
| 72 h (3.0 d)[1][7] | |
|
0.0599[4] 0.075±0.004[5] 0.0813±0.0159[6] 0.0599±0.007[1] | |
|
B–V = 0.785 U–B = 0.383 Tholen = T T [3] | |
| 11.93 | |
|
| |
1236 Thaïs, provisional designation 1931 VX, is a rare type of asteroid from the inner regions of the asteroid belt, about 20 kilometers in diameter. It was discovered on 6 November 1931, by Soviet–Russian astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula.[8]
The dark and reddish T-type asteroid orbits the Sun at a distance of 1.8–3.0 AU once every 3 years and 9 months (1,384 days). Its orbit shows a high eccentricity of 0.24 and is tilted by 13 degrees to the plane of the ecliptic. It has a notably long rotation period of 72 hours[7] and an albedo in the range of 0.06 to 0.08, according to the surveys carried out by IRAS, Akari, and WISE/NEOWISE.[4][5][6]
It was later named after the famous Greek hetaera Thaïs who lived during the time of Alexander the Great and accompanied him on his campaigns.[2]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 1236 Thais (1931 VX)" (2015-11-13 last obs.). Jet Propulsion Laboratory. Retrieved 28 April 2016.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1236) Thaïs. Springer Berlin Heidelberg. p. 103. ISBN 978-3-540-29925-7. Retrieved December 2015.
- 1 2 "LCDB Data for (1236) Thais". Asteroid Lightcurve Database (LCDB). Retrieved December 2015.
- 1 2 3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved December 2015.
- 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved December 2015.
- 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved December 2015.
- 1 2 Schober, H. J.; Schroll, A. (April 1983). "Rotation properties of the high-numbered asteroids 1236 Thais and 1317 Silvretta". Astronomy and Astrophysics: 106–108.Sponsorship:FondszurFoerderungderwissenschaftlichenForschung.(A&AHomepage). Bibcode:1983A&A...120..106S. ISSN 0004-6361. Retrieved December 2015.
- ↑ "1236 Thais (1931 VX)". Minor Planet Center. Retrieved December 2015.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1236 Thaïs at the JPL Small-Body Database
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