308 Polyxo
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| Discovery A | |
|---|---|
| Discoverer | A. Borrelly |
| Discovery date | March 31, 1891 |
| Alternate designations B |
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| Category | Main belt |
| Orbital elements C | |
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| Eccentricity (e) | 0.038 |
| Semi-major axis (a) | 411.542 Gm (2.751 AU) |
| Perihelion (q) | 395.843 Gm (2.646 AU) |
| Aphelion (Q) | 427.242 Gm (2.856 AU) |
| Orbital period (P) | 1666.571 d (4.56 a) |
| Mean orbital speed | 17.96 km/s |
| Inclination (i) | 4.364° |
| Longitude of the ascending node (Ω) |
181.927° |
| Argument of perihelion (ω) |
109.987° |
| Mean anomaly (M) | 248.11° |
| Physical characteristics D | |
| Dimensions | 141.0 km |
| Mass | unknown |
| Density | unknown |
| Surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | unknown |
| Spectral class | T |
| Absolute magnitude | 8.17 |
| Albedo (geometric) | unknown |
| Mean surface temperature |
unknown |
308 Polyxo is a very large Main belt asteroid. It is classified as a rare T-type asteroid.
It was discovered by A. Borrelly on March 31, 1891 in Marseilles.
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