230 Athamantis

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230 Athamantis
230Athamantis (Lightcurve Inversion).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
Alternative names 1949 WG
Minor planet category 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)
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°
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
Rotation period 23.99[2] h
Albedo 0.181
Spectral type S
Absolute magnitude (H) 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[edit]

  1. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: 98-118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  2. ^ 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 62: 512–517, Bibcode:1985Icar...62..512Z, doi:10.1016/0019-1035(85)90191-5. 

External links[edit]