Samiksha Jaiswal

129 Antigone

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Discovery date  5 February 1873
Observation arc  112.47 yr (41080 d)
Discovered  5 February 1873
Spectral type  M-type asteroid
Discovery site  Litchfield Observatory
Minor planet category  Main belt
Aphelion  3.4773 AU (520.20 Gm)
Orbits  Sun
Named after  Antigone
129 Antigone
Discovered by  Christian Heinrich Friedrich Peters
Perihelion  2.26344 AU (338.606 Gm)
Discoverer  Christian Heinrich Friedrich Peters
Similar  Christian Heinrich Friedrich Peters discoveries, Other celestial objects

The asteroid 129 antigone passes in front of a bright star on september 9 2001


129 Antigone is a large main-belt asteroid. Radar observations indicate that 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 German-American astronomer 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. A model constructed from these shows Antigone itself to be quite regularly shaped. In 1990, the asteroid was observed from the Collurania-Teramo Observatory, allowing a composite light curve to be produced that showed a rotation period of 4.9572 ± 0.0001 hours and a brightness variation of 0.34 ± 0.01 in magnitude. The ratio of the lengths of the major to minor axes for this asteroid were found to be 1.45 ±0.02.

10µ radiometric data collected from Kitt Peak in 1975 gave a diameter estimate of 114 km. Since 1985, a total of three stellar occultations by Antigone have been observed. A favorable occultation of a star on April 11, 1985, was observed from sites near Pueblo, Colorado, allowing a diameter estimate of 113.0 ± 4.2 km to be calculated.

References

129 Antigone Wikipedia


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