(91) Aegina
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Asteroid (91) Aegina |
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| Properties of the orbit ( animation ) | |
| Orbit type | Middle main belt |
| Asteroid family | Astraea family |
| Major semi-axis | 2.59 AU |
| eccentricity | 0.107 |
| Perihelion - aphelion | 2.314 AU - 2.866 AU |
| Inclination of the orbit plane | 2.1 ° |
| Length of the ascending node | 10.8 ° |
| Argument of the periapsis | 73.4 ° |
| Time of passage of the perihelion | January 15, 2009 |
| Sidereal period | 4 a 62 d |
| Mean orbital velocity | 18.5 km / s |
| Physical Properties | |
| Medium diameter | 110 km |
| Albedo | 0.0426 |
| Rotation period | 6 h 2 min |
| Absolute brightness | 8.84 likes |
| Spectral class | CP |
| history | |
| Explorer | É. Stephan |
| Date of discovery | November 4, 1866 |
| 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. | |
(91) Aegina is an asteroid of the main belt that was discovered on November 4, 1866 by the French astronomer Édouard Jean-Marie Stephan at the Observatoire de Marseille . It was the second and last asteroid that Stephan discovered after (89) Julia .
The asteroid was named after the nymph Aigina from Greek mythology .
Based on its orbital period and its period of rotation, the result is that the asteroid performs 6,054.7 self-rotations ("days") in an Aegina year .
See also
Individual evidence
- ^ Discovery Circumstances: Numbered Minor Planets. The international Astronomical Union - Minor Planet Center, accessed August 7, 2020 .