132 Aethra
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| Discovery | |
|---|---|
| Discovered by: | James C. Watson |
| Discovery date: | June 13, 1873 |
| Orbital characteristics | |
| Epoch July 14, 2004 (JD 2453200.5) | |
| Aphelion | 541.841 Gm (3.622 AU) |
| Perihelion: | 238.558 Gm (1.595 AU) |
| Semi-major axis: | 390.199 Gm (2.608 AU) |
| Eccentricity: | 0.389 |
| Orbital period: | 1538.652 d (4.21 a) |
| Avg. orbital speed: | 17.72 km/s |
| Mean anomaly: | 89.813° |
| Inclination: | 25.055° |
| Longitude of ascending node: | 258.945° |
| Argument of perihelion: | 254.330° |
| Physical characteristics | |
| Dimensions: | 42.7 km |
| Mass: | 8.2×1016 kg |
| Mean density: | 2 ? g/cm³ |
| Equatorial surface gravity: | 0.012 m/s² |
| Escape velocity: | 0.023 km/s |
| Rotation period: | 0.2153 d 1 |
| Albedo: | 0.172 2 |
| Temperature: | ~168 K |
| Spectral type: | M? |
| Absolute magnitude: | 9.38 |
132 Aethra is a M-type main belt asteroid. It was found by James Craig Watson in 1873. It has a rather eccentric orbit that sometimes brings it closer to the Sun than the planet Mars. It was the first such Mars-crosser asteroid to be found.
The changing light curve of the asteroid means that it has a stretched or non-spherical shape for its body.
It is named after Aethra, the mother of Theseus in Greek mythology.
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131 Vala | 132 Aethra | 133 Cyrene
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| Near-Earth asteroids · Main belt · Jupiter Trojans · Neptune Trojans · Comets · Kuiper belt · Oort cloud |
