Comet
Hale-Bopp
TypeComet
Mass~1 × 10¹⁵ kg
Diameter60 km
Orbital Radius28,600 million km
Orbital Period~2.5 million
Rotation Period11.35 hours
Known Moons0
Surface Gravity~0.001 m/s²
Average Temp-40 °C
AtmosphereH2O, CO, CO2, CH3OH
Discovered ByHale and Bopp
Discovery Year1995
About Hale-Bopp
One of the brightest comets of the 20th century, visible to the naked eye for 18 months in 1996-1997. Had two distinct tails. Discovered independently by Alan Hale and Thomas Bopp. Nucleus estimated at 40-80 km, unusually large. Will not return for about 2,500 years.
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