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| 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 | SApproximately 17% of all known asteroids are of an S-type (for stony composition. S-types are moderately bright (with an albedo of 0. 22) and consist of metallic nickel- iron mixed with iron- and magnesium- silicates. They dominate the inner to central ma |
| Abs. magnitudeIn astronomy, absolute magnitude is the apparent magnitude, m an object would have if it were at a standardized distance away. It allows the overall brightnesses of objects to be compared without regards to distance. Absolute Magnitude for stars M In stel | 7.07 |
| AlbedoNote: This article discusses the physical or planetological property of albedo. For other usage, see Albedo (disambiguation). The albedo is a measure of reflectivity of a surface or body. It is the ratio of electromagnetic radiation reflected to the amoun 4 | 0.166 |
| History 2 | |
| Discoverer | C. H. F. PetersChristian Heinrich Friedrich Peters ( September 19, 1813 July 18, 1890) was an American astronomer, and one of the first to discover asteroids. Not to be confused with the German astronomer Christian August Friedrich Peters (1806 1880). He was born in Sch, 1873Events The United Kingdom declares war against Ghana's King Kofi KariKari, who was involved in the trading of slaves. The war ended by July and the British established the Gold Coast Colony. January 17 Indian Wars: First Battle of the Stronghold during th |
129 Antigone is a large main belt asteroidAn asteroid is a small, solid object in our Solar System, orbiting the Sun. An asteroid is an example of a minor planet (or planetoid , which are much smaller than planets. The asteroids are believed to be remnants of the protoplanetary disc which were no. 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 lightcurve data shows Antigone itself to be quite regularly shaped. [2]
Since 1985, a total of three stellar occultations by Antigone have been observed.