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Discovery
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| Discovered by | Auguste Charlois |
| Discovery date | November 28, 1892 |
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Designations
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| Alternate name(s) | 1892 R |
| Minor planet category |
Main belt |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 474.913 Gm (3.175 AU) |
| Perihelion | 413.851 Gm (2.766 AU) |
| Semi-major axis | 444.382 Gm (2.971 AU) |
| Eccentricity | 0.069 |
| Orbital period | 1869.979 d (5.12 a) |
| Average orbital speed | 17.28 km/s |
| Mean anomaly | 299.322° |
| Inclination | 9.765° |
| Longitude of ascending node | 90.21° |
| Argument of perihelion | 7.488° |
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Physical characteristics
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| Dimensions | 83.0 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) | 9.4 |
348 May is a large Main belt asteroid.
It was discovered by Auguste Charlois on November 28, 1892 in Nice.
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