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Discovery
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| Discovered by | Johann Palisa |
| Discovery date | February 14, 1891 |
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Designations
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| Minor planet category |
Main belt |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 439.164 Gm (2.936 AU) |
| Perihelion | 280.017 Gm (1.872 AU) |
| Semi-major axis | 359.591 Gm (2.404 AU) |
| Eccentricity | 0.221 |
| Orbital period | 1361.177 d (3.727a) |
| Average orbital speed | 18.974 km/s |
| Mean anomaly | 32.708° |
| Inclination | 15.838° |
| Longitude of ascending node | 159.231° |
| Argument of perihelion | 172.392° |
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Physical characteristics
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| Dimensions | 68.0 km |
| Mass | unknown |
| Mean density | unknown |
| Equatorial surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | unknown |
| Albedo | unknown |
| Temperature | unknown |
| Spectral type | C |
| Absolute magnitude (H) | 9.74 |
304 Olga is a large Main belt asteroid. It is classified as a C-type asteroid and is probably composed of carbonaceous material.
It was discovered by Johann Palisa on February 14, 1891 in Vienna.
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