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| Orbital characteristics 1 | |
|---|---|
| Orbit type | Main belt ( Themis ) |
| Semimajor axis | 3.157 AU |
| Perihelion distance | 2.665 AU |
| Aphelion distance | 3.649 AU |
| Orbital period | 5.61 years |
| Inclination | 2.22° |
| Eccentricity | 0.156 |
| Physical characteristics | |
| Diameter 3 | 85, 85 km |
| Rotation period 3 | 16.496 hours ( sync.) |
| Spectral classAn 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 1 | CC-type asteroids are carbonaceous asteroids. They form 75% of known asteroids, and are extremely dark ( albedo 0. 03), similar to carbonaceous chondrite meteorites (types CI and CM). They dominate the outer belt beyond 2. These asteroids have approximatel |
| 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 1 | 8.27 |
| 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 | 0.060 |
| History 2 | |
| Discoverer | R. LutherKarl Theodor Robert Luther ( April 16 1822 February 15 1900) was a German astronomer who searched for asteroids while working in Dusseldorf. Two of his discoveries are now known to have unusual properties: the binary asteroid with equal components 90 Anti, 18661866 is a common year starting on Monday. Events January 6 Ottoman troops clash with men of a Maronite leader Karam in St. Doumit in Lebanon Turks are defeated January 12 Royal Aeronautical Society is formed ( London) January 28 800 Maronite troops clash |
| Satellites | |
| Designation | S/2000 (90) 1 |
90 Antiope is an 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 discovered on October 1, 1866 by Robert Luther. The 90th asteroid to be discovered, it is named after an Amazon princess, sister of Hippolyte and daughter of Ares, who was taken prisoner by Heracles and later married Theseus. Alternatively, there is another Antiope in Greek legend, a daughter of Nycteus, king of Thebes, and mother of two children by Zeus.
Antiope is classified as a member of the Themis family of asteroids.
One observed stellar occultation by Antiope has been reported, on ( June 11, 1980).
In 2000, it was discovered that Antiope is a double asteroid, consisting of two individual bodies about 80 kilometers across and separated by 170 kilometers, orbiting around a common center. A complete revolution takes 16.5 hours. Their composition is C-type, which means that they are dark in colouring with a carbonate composition.
The discovery was made with the Keck Telescope at Mauna Kea using adaptive optics, allowing the two components to be resolved.