1208 Troilus
| Discovery [1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 31 December 1931 |
| Designations | |
| MPC designation | 1208 Troilus |
|
Named after
|
Troilus (Greek mythology)[2] |
| 1931 YA · 1965 WK | |
| Jupiter trojan [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 83.16 yr (30,375 days) |
| Aphelion | 5.7340 AU |
| Perihelion | 4.7661 AU |
| 5.2500 AU | |
| Eccentricity | 0.0921 |
| 12.03 yr (4,394 days) | |
| 106.37° | |
| Inclination | 33.542° |
| 48.555° | |
| 296.74° | |
| Physical characteristics | |
| Dimensions | 103.34 km[4] 111.36±2.36 km[5] 100.48±1.10 km[6] 103.31 km (derived)[3] |
| 56.17 h[7] 24 h[8] 63.8±0.5 h[9] |
|
| 0.0419[4] 0.037±0.002[5] 0.041±0.006[6] 0.0397 (derived)[3] |
|
| B–V = 0.693 U–B = 0.314 Tholen = FCU F [3] |
|
| 8.99 | |
1208 Troilus, provisional designation 1931 YA, is a heavily tilted, large and dark Jupiter trojan, about 103 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany on 31 December 1931.[10]
The carbonaceous asteroid has a relatively rare F-type spectrum, classified as a FCU-type in the Tholen taxonomy system. It orbits the Sun at a distance of 4.8–5.7 AU once every 12.03 years (4,394 days). Its orbit shows an eccentricity of 0.09 and is significantly inclined by 34 degrees to the plane of the ecliptic. It has a rotation period of 56 hours[7] with a more recent but provisional 2014-measurement of 63 hours.[9] The body's albedo amounts to 0.04, according to the surveys carried out by the space-spaced missions, IRAS, Akari, and WISE/NEOWISE.[4][5][6]
The minor planet was named after the young Trojan prince Troilus, from Greek mythology. He is the son of King Priam (also see 884 Priamus), who in a medieval legend loved Cressida (see 548 Kressida) and lost her to Diomedes (see 1437 Diomedes). Troilus was killed by Achilles (see 588 Achilles) in the Trojan War.[2]
References
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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
- 1208 Troilus at the JPL Small-Body Database
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