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Discovery
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| Discovered by | Johann Palisa |
| Discovery date | September 4, 1891 |
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Designations
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| Alternate name(s) | none |
| Minor planet category |
Main belt (Flora family) |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 391.583 Gm (2.618 AU) |
| Perihelion | 278.998 Gm (1.865 AU) |
| Semi-major axis | 335.29 Gm (2.241 AU) |
| Eccentricity | 0.168 |
| Orbital period | 1225.558 d (3.36 a) |
| Average orbital speed | 19.9 km/s |
| Mean anomaly | 293.063° |
| Inclination | 2.426° |
| Longitude of ascending node | 161.765° |
| Argument of perihelion | 172.823° |
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Physical characteristics
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| Dimensions | 5 - 12 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) | 13.2 |
315 Constantia is a small asteroid belonging to the Flora family in the Main Belt.
It was discovered by Johann Palisa on September 4, 1891 in Vienna.
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