90 Antiope (/ænˈtaɪ.əpiː/ an-TY-ə-pee) is a double asteroid in the outer asteroid belt. It was discovered on October 1 1866 by Robert Luther. In 2000 it was found to consist of two almost-equally-sized bodies orbiting each other. At average diameters of about 88 km and 84 km both components are among the 500 largest asteroids. Antiope is a member of the Themis family of asteroids that share similar orbital elements.
apoapsis (km)
5.4594e+11, 5.45942e+11
average speed (km/s)
64.8, 59976.0
maximum temperature (K)
244.0
mean temperature (K)
158.0, 158.15
orbital period (μ)
3.456, 1.76852e+08
periapsis (km)
3.9802e+11
absolute magnitude
8.27, 9.02
albedo
0.06
discovery date
1866-10-01, 2000-08-10
discoverer
Robert Luther, C._Dumas, C._R._Chapman, F._Menard, J._C._Shelton, L._M._Close, W._J._Merline, D._C._Slater
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