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Discovery
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| Discovered by | K. de Ball |
| Discovery date | September 3, 1882 |
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Designations
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| Named after | Helle |
| Alternate name(s) | 1949 WG |
| Minor planet category |
Main belt |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 378.299 Gm (2.529 AU) |
| Perihelion | 334.395 Gm (2.235 AU) |
| Semi-major axis | 356.347 Gm (2.382 AU) |
| Eccentricity | 0.062 |
| Orbital period | 1342.801 d (3.68 a) |
| Average orbital speed | 19.3 km/s |
| Mean anomaly | 70.608° |
| Inclination | 9.435° |
| Longitude of ascending node | 239.979° |
| Argument of perihelion | 138.926° |
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Physical characteristics
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| Dimensions | 109.0 km |
| Mass | unknown |
| Mean density | unknown |
| Equatorial surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | 24.0055 h |
| Albedo | 0.181 |
| Temperature | unknown |
| Spectral type | S |
| Absolute magnitude (H) | 7.35 |
230 Athamantis is a fairly large main-belt asteroid. It is classified as an S-type asteroid, and was discovered by K. de Ball on September 3, 1882, in Bothkamp. It was his only asteroid discovery.
The asteroid was named after Athamantis, daughter of Athamas the mythical Greek king of Orchomenus.
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