Comet
Swift-Tuttle
TypeComet
Mass~1 × 10¹⁶ kg
Diameter26 km
Orbital Radius3,900 million km
Orbital Period48,600 days
Known Moons0
Surface Gravity~0.001 m/s²
Average Temp-70 °C
AtmosphereH2O, CO, CO2 (coma)
Discovered BySwift and Tuttle
Discovery Year1862
About Swift-Tuttle
Parent of the August Perseids, the richest annual meteor shower. Its 26 km nucleus is among the biggest known. Next perihelion arrives in 2126.
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