2241 Alcathous
| Discovery | |
|---|---|
| Discovered by | C. Kowal |
| Discovery site | Palomar Obs. |
| Discovery date | 22 November 1979 |
| Designations | |
| MPC designation | 2241 Alcathous |
| Pronunciation | ælˈkæθoʊəs (al-kath'-oe-əs) |
|
Named after
|
Alcathous (Greek mythology, Iliad) |
| 1979 WM · 1950 NC 1968 WF |
|
|
Jupiter trojan (Trojan camp) |
|
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 66.38 yr (24,246 days) |
| Aphelion | 5.5335 AU |
| Perihelion | 4.8356 AU |
| 5.1846 AU | |
| Eccentricity | 0.0673 |
| 11.81 yr (4,312 days) | |
| 281.00° | |
| Inclination | 16.624° |
| 267.98° | |
| 291.32° | |
| Jupiter MOID | 0.1467 AU |
| Jupiter Tisserand parameter | 2.9120 |
| Physical characteristics | |
| Dimensions |
113.68±1.72 km 113.682±1.716 114.63 km 118.87±2.27 km |
|
7.689±0.001 h 7.687±0.005 h 7.690±0.001 h 7.691±0.001 h 7.695±0.002 h 9.41 h (dated) |
|
|
0.044±0.002 0.0471 0.048±0.012 |
|
|
B–V = 0.728 U–B = 0.226 Tholen = D · D |
|
| 8.61±0.25 · 8.64 | |
2241 Alcathous (AL-kath'-OE-əs), provisional designation 1979 WM, is a dark and reddish Jupiter trojan, approximately 114 kilometers in diameter. It was discovered on 22 November 1979, by American astronomer Charles Kowal at the U.S. Palomar Observatory in southern California. It is named after Alcathous from Greek mythology.
Alcathous orbits the Sun at a distance of 4.8–5.5 AU once every 11 years and 10 months (4,312 days). Its orbit has an eccentricity of 0.07 and an inclination of 17° with respect to the ecliptic.of 4.8–5.5 AU once every 11 years and 10 months (4,317 days). Its orbit is tilted by 17 degrees to the plane of the ecliptic and shows an eccentricity of 0.07.
A first precovery was taken at Palomar Observatory in June 1950, extending the body's observation arc by 29 years prior to its official discovery observation.
Alcathous is classified as a D-type asteroid in the Tholen taxonomic classification, and the eighth largest of a total of 46 known asteroids of this spectral type.
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