Asteroid
Kleopatra
TypeAsteroid
Mass~4 × 10¹⁸ kg
Diameter217 km
Orbital Radius417 million km
Orbital Period1,702 days
Rotation Period5.39 hours
Known Moons2
Surface Gravity~0.02 m/s²
Average Temp-110 °C
AtmosphereNone
Discovered ByJohann Palisa
Discovery Year1880
About Kleopatra
A metallic dog-bone asteroid 270 km long, mapped by radar. Its two small moons, Alexhelios and Cleoselene, were discovered in 2008. Likely the remnant of an ancient violent collision.
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