(5145) Pholus
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Asteroid (5145) Pholus |
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| Properties of the orbit ( animation ) | |
| Orbit type | centaur |
| Major semi-axis | 20.3384 AU |
| eccentricity | 0.5736 |
| Perihelion - aphelion | 8.6715 AU - 32.0053 AU |
| Inclination of the orbit plane | 24.7320 ° |
| Length of the ascending node | 119.2540 ° |
| Argument of the periapsis | 354.9434 ° |
| Sidereal period | 91.72 years |
| Mean orbital velocity | 6.03 km / s |
| Physical Properties | |
| Medium diameter | (190 ± 26) km |
| Albedo | 0.044 |
| Rotation period | 9.980 h |
| Absolute brightness | 7.1 likes |
| Spectral class | Z |
| history | |
| Explorer |
David Rabinowitz ( Spacewatch ) |
| Date of discovery | January 9, 1992 |
| Another name | 1992 AD |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(5145) Pholus is an asteroid belonging to the group of centaurs that was discovered by David Rabinowitz on January 9, 1992 .
The celestial body was named after Pholos , a centaur from Greek mythology .
Pholus will walk around the sun on a strongly eccentric orbit in around 92 years . The perihelion distance lies with 8.71 AU within the orbit of the planet Saturn , in the aphelion of 32.14 AU outside the orbit of Neptune . The orbit eccentricity is 0.574, with the orbit at 24.697 ° being strongly inclined towards the ecliptic . Pholus was probably originally an object of the Kuiper Belt .
The diameter of Pholus was determined to be 185 km (± 16 km). It has a dark surface with an albedo of 0.04. Investigations of its spectrum show that the surface has a deep red color, which suggests the presence of hydrocarbon compounds . Unlike the previously discovered centaur (2060) Chiron , it shows no traces of past cometic activity.
It rotates around its own axis in around 10 hours.
See also