129 Antigone

129 Antigone
Orbital characteristics 1
Orbit type Main belt
Semimajor axis 2.868 AU
Perihelion distance 2.256 AU
Aphelion distance 3.481 AU
Orbital period 4.86 years
Inclination 12.22°
Eccentricity 0.214
Physical characteristics 1
Diameter 125 km
Rotation period 4.957 hours
Spectral class 5 S
Abs. magnitude 7.07
Albedo 4 0.166
History 2
Discoverer C. H. F. Peters, 1873

129 Antigone is a large main belt asteroid. It is composed of almost pure nickel-iron. It and other similar asteroids probably originate from the core of a shattered Vesta-like planetesimal which had a differentiated interior.

It was discovered by C. H. F. Peters on February 5, 1873 and named after Antigone, the Theban princess in Greek mythology.

In 1979 a possible satellite of Antigone was suggested based on lightcurve data [1]. A model constructed from these shows Antigone itself to be quite regularly shaped [2].

Since 1985, a total of three stellar occultations by Antigone have been observed.

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