Asteroid
Gaspra
TypeAsteroid
Mass~1 × 10¹⁶ kg
Diameter18 km
Orbital Radius331 million km
Orbital Period1,202 days
Rotation Period7.04 hours
Known Moons0
Surface Gravity~0.001 m/s²
Average Temp-100 °C
AtmosphereNone
Discovered ByGrigory Neujmin
Discovery Year1916
About Gaspra
The first asteroid photographed up close, by the Galileo probe en route to Jupiter in 1991. An elongated S-type body scarred by grooves and more than 600 craters.
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