| Minorplanet: | yes |
| Background: |
|
| 230 Athamantis | |
| Discovered: | 3 September 1882 |
| Mpc Name: | (230) Athamantis |
| Alt Names: | 1949 WG |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 2.38229AU |
| Perihelion: | 2.23641AU |
| Aphelion: | 2.52818abbr=onNaNabbr=on |
| Eccentricity: | 0.06124 |
| Period: | 3.68 yr (1343.0 d) |
| Inclination: | 9.443° |
| Asc Node: | 239.9° |
| Arg Peri: | 139.1° |
| Avg Speed: | 19.3 km/s |
| Dimensions: | c/a = |
| Mean Diameter: | [1] 110.17 ± 4.57 km |
| Mass: | |
| Density: | |
| Rotation: | 24.0055abbr=onNaNabbr=on 23.99 h |
| Abs Magnitude: | 7.35 |
| Albedo: | 0.146 (calculated) |
| Mean Motion: | / day |
| Orbit Ref: | [2] |
| Observation Arc: | 133.58 yr (48791 d) |
| Uncertainty: | 0 |
230 Athamantis is a fairly large main-belt asteroid that was discovered by the German-Austrian astronomer 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.
Photometric observations of this asteroid gave a light curve with a period of 23.99 hours and a brightness variation of more than 0.20 in magnitude. It has the spectrum of an S-type asteroid. During 1991, the asteroid was observed occulting a star. The resulting chords provided a cross-section diameter estimate of 101.8 km.
left|thumb|A three-dimensional model of 230 Athamantis based on its light curve