4348 Poulydamas
| Discovery [1] | |
|---|---|
| Discovered by | C. S. Shoemaker |
| Discovery site | Palomar Obs. |
| Discovery date | 11 September 1988 |
| Designations | |
| MPC designation | 4348 Poulydamas |
|
Named after
|
Poulydamas (Greek mythology)[2] |
| 1988 RU · 1977 SP1 1977 TV4 · 1983 GJ 1988 PK4 |
|
| Jupiter trojan[3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 62.14 yr (22,695 days) |
| Aphelion | 5.7549 AU |
| Perihelion | 4.7256 AU |
| 5.2403 AU | |
| Eccentricity | 0.0982 |
| 12.00 yr (4,382 days) | |
| 59.546° | |
| Inclination | 7.9578° |
| 220.11° | |
| 160.34° | |
| Physical characteristics | |
| Dimensions | 87.51±5.02 km[4] 82.03±0.63 km[5] 66.92 km (calculated)[3] 80 km (generic)[6][7] |
| 9.908±0.018 h[8] 9.9214±0.0085 h[9] 9.88±0.01 h[10] |
|
| 0.048±0.006[4] 0.033±0.005[5] 0.057 (assumed)[3] |
|
| C [3] | |
| 9.6[1] | |
4348 Poulydamas, provisional designation 1988 RU, is a large carbonaceous Jupiter Trojan, about 80 kilometers in diameter. It was discovered by American female astronomer Carolyn Shoemaker at the U.S. Palomar Observatory in California, on 11 September 1988.[11]
The dark C-type asteroid orbits the Sun in the Trojan camp at a distance of 4.7–5.8 AU once every 12.00 years (4,382 days). Its orbit shows an eccentricity of 0.10 and is tilted by 8 degrees to the plane of the ecliptic.[1] During 1990, photometric observations of this asteroid were used to build a light-curve showing a rotation period of 9.908±0.018 hours with a brightness variation of 0.21±0.01 magnitude.[8]
Based on the surveys carried out by the Japanese Akari and the NEOWISE mission of the U.S. Wide-field Infrared Survey Explorer, the asteroid has a very low albedo of 0.048 and 0.033, while the Collaborative Asteroid Lightcurve Link (CALL) assumes a somewhat higher albedo of 0.057 for the carbonaceous body. Accordingly, CALL calculates the asteroid's diameter to be only 67 kilometers while the two space-based surveys gave a larger diameter of 82 and 88 kilometers, respectively.[3][4][5]
The minor planet was named after Poulydamas from Greek mythology, the most trusted strategist and advisor of the Trojan prince Hector, after whom the minor planet 624 Hektor is named, and who was born on the same night as Poulydamas. The gods gave Hektor skill with arms and gave Poulydamas better judgment. He sensibly advised Hektor to lock the gates of Troy against Achilles (also see 588 Achilles), but Hector disregarded his friend's advice and went out of the city to his doom and to the eventual doom of Troy.[2]
References
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- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 3.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 5.2 Lua error in package.lua at line 80: module 'strict' not found.
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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
- 4348 Poulydamas at the JPL Small-Body Database
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