Dimorphos
Natural satellite
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Dimorphos is a natural satellite or moon of the near-Earth asteroid 65803 Didymos, with which it forms a binary system. The moon was discovered on 20 November 2003 by Petr Pravec in collaboration with other astronomers worldwide. Wikipedia
Radius: 278.87′
Mass: 5 billion kg
Orbits: 65803 Didymos
Discovered: November 20, 2003
Discoverer: Petr Pravec
Alternative names: S/2003 (65803) 1; Didymos B; "Didymoon"
Designation: Didymos I