(132) Aethra
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Asteroid (132) Aethra |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 2.609 AU |
| eccentricity | 0.389 |
| Perihelion - aphelion | 1.593 AU - 3.625 AU |
| Inclination of the orbit plane | 25 ° |
| Length of the ascending node | 258.4 ° |
| Argument of the periapsis | 255.1 ° |
| Time of passage of the perihelion | December 2, 2011 |
| Sidereal period | 4 a 78 d |
| Mean orbital velocity | 17.7 km / s |
| Physical Properties | |
| Medium diameter | 42.87 km |
| Albedo | 0.1990 |
| Rotation period | 5 h 10 min |
| Absolute brightness | 9.21 mag |
| Spectral class | M. |
| history | |
| Explorer | JC Watson |
| Date of discovery | June 13, 1873 |
| Another name | 1949 MD, 1953 LF, A922 XB |
| 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. | |
(132) Aethra is an asteroid of the main asteroid belt discovered by James Craig Watson on June 13, 1873 .
The celestial body was named after Aethra , the mother of the hero Theseus from Greek mythology .
Aethra moves between 1.5944 ( perihelion ) astronomical units to 3.6214 astronomical units ( aphelion ) in 4.212 years on an eccentric orbit around the sun . The orbit is strongly inclined towards the ecliptic at 25.0588 ° , the orbit eccentricity is 0.3886.
Aethra is 43 km in diameter. It has a relatively bright, metal-containing surface with an albedo of 0.172.
It rotates around its own axis in around 5 hours and 10 minutes.