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Discovery
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| Discovered by | Auguste Charlois |
| Discovery date | August 3, 1889 |
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Designations
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| Minor planet category |
Main belt |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 557.344 Gm (3.726 AU) |
| Perihelion | 364.664 Gm (2.438 AU) |
| Semi-major axis | 461.004 Gm (3.082 AU) |
| Eccentricity | 0.209 |
| Orbital period | 1975.873 d (5.41 a) |
| Average orbital speed | 16.97 km/s |
| Mean anomaly | 91.705° |
| Inclination | 17.621° |
| Longitude of ascending node | 311.449° |
| Argument of perihelion | 15.172° |
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Physical characteristics
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| Dimensions | 45.0 km |
| Mass | unknown |
| Mean density | unknown |
| Equatorial surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | unknown |
| Albedo | unknown |
| Temperature | unknown |
| Spectral type | unknown |
| Absolute magnitude (H) | 10.5 |
285 Regina is typical, although fairly large Main belt asteroid.
It was discovered by Auguste Charlois on August 3, 1889 in Nice.
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