230 Athamantis
.png) A three-dimensional model of 230 Athamantis based on its light curve. | |
| Discovery | |
|---|---|
| Discovered by | K. de Ball |
| Discovery date | September 3, 1882 |
| Designations | |
Named after | Helle |
| 1949 WG | |
| Main belt | |
| Orbital characteristics | |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 378.299 Gm (2.529 AU) |
| Perihelion | 334.395 Gm (2.235 AU) |
| 356.347 Gm (2.382 AU) | |
| Eccentricity | 0.062 |
| 1342.801 d (3.68 a) | |
Average orbital speed | 19.3 km/s |
| 70.608° | |
| Inclination | 9.435° |
| 239.979° | |
| 138.926° | |
| Physical characteristics | |
| Dimensions | 110.17 ± 4.57[1] km |
| Mass | (1.89 ± 0.19) × 1018[1] kg |
Mean density | 2.69 ± 0.43[1] g/cm3 |
| 23.99[2] h | |
| Albedo | 0.181 |
Spectral type | S |
| 7.35 | |
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.[2] It has the spectrum of an S-type asteroid.
References
- ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- ^ a b Zeigler, K. W.; Florence, W. B. (June 1985), "Photoelectric photometry of asteroids 9 Metis, 18 Melpomene, 60 Echo, 116 Sirona, 230 Athamantis, 694 Ekard, and 1984 KD", Icarus, vol. 62, pp. 512–517, Bibcode:1985Icar...62..512Z, doi:10.1016/0019-1035(85)90191-5.
External links
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
- 230 Athamantis at the JPL Small-Body Database
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