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Discovery
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| Discovered by | Max Wolf |
| Discovery date | October 17, 1892 |
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Designations
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| Named after | Endymion |
| Alternate name(s) | 1892 K |
| Minor planet category |
Main belt |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 433.313 Gm (2.897 AU) |
| Perihelion | 335.435 Gm (2.242 AU) |
| Semi-major axis | 384.374 Gm (2.569 AU) |
| Eccentricity | 0.127 |
| Orbital period | 1504.296 d (4.12 a) |
| Average orbital speed | 18.58 km/s |
| Mean anomaly | 49.705° |
| Inclination | 7.339° |
| Longitude of ascending node | 232.772° |
| Argument of perihelion | 225.41° |
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Physical characteristics
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| Dimensions | 61.0 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) | 10.22 |
342 Endymion is a large Main belt asteroid.
It was discovered by Max Wolf on October 17, 1892 in Heidelberg.
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