129 Antigone
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| Orbital characteristics 1 (ftp://ftp.lowell.edu/pub/elgb/astorb.html) | |
|---|---|
| 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 (ftp://ftp.lowell.edu/pub/elgb/astorb.html) | |
| Diameter | 125 km |
| Rotation period | 4.957 hours |
| Spectral class 5 (http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT) | S |
| Abs. magnitude | 7.07 |
| Albedo 4 (http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT) | 0.166 |
| History 2 (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html) | |
| 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] (http://www.johnstonsarchive.net/astro/asteroidmoonsq.html). A model constructed from these shows Antigone itself to be quite regularly shaped [2] (http://www.astro.helsinki.fi/~kaselain/thirty.pdf).
Since 1985, a total of three stellar occultations by Antigone have been observed.
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