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Discovery
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| Discovered by | Horace Parnell Tuttle |
| Discovery date | April 9, 1861 |
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Designations
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| Named after | Maia |
| Alternate name(s) | |
| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 464.253 Gm (3.103 AU) |
| Perihelion | 327.082 Gm (2.186 AU) |
| Semi-major axis | 395.668 Gm (2.645 AU) |
| Eccentricity | 0.173 |
| Orbital period | 1571.107 d (4.30 a) |
| Average orbital speed | 18.18 km/s |
| Mean anomaly | 69.159° |
| Inclination | 3.047° |
| Longitude of ascending node | 7.665° |
| Argument of perihelion | 43.718° |
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Physical characteristics
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| Dimensions | 72.8 km |
| Mass | 4.0×1017 kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | 0.0203 m/s² |
| Escape velocity | 0.0385 km/s |
| Rotation period | ? d |
| Albedo | 0.060 [1] |
| Temperature | ~171 K |
| Spectral type | C |
| Absolute magnitude (H) | 9.36 |
66 Maja ( /ˈmaɪ.ə/) is a dark, quite large main-belt asteroid. It was discovered by Horace Tuttle on April 9, 1861, and named after Maia, one of the Pleiades in Greek mythology.
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