440 Theodora
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Discovery
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| Discovered by | E. F. Coddington |
| Discovery date | October 13, 1898 |
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Designations
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| Alternate name(s) | 1898 EC |
| Minor planet category |
Main belt |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 366.262 Gm (2.448 AU) |
| Perihelion | 295.119 Gm (1.973 AU) |
| Semi-major axis | 330.691 Gm (2.211 AU) |
| Eccentricity | 0.108 |
| Orbital period | 1200.425 d (3.29 a) |
| Average orbital speed | 20.03 km/s |
| Mean anomaly | 45.049° |
| Inclination | 1.598° |
| Longitude of ascending node | 292.35° |
| Argument of perihelion | 178.848° |
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Physical characteristics
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| Dimensions | 11 - 24 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) | 11.5 |
440 Theodora is a small Main belt asteroid.
It was discovered by E. F. Coddington on October 13, 1898 at Mount Hamilton. It was his second asteroid discovery.
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