Comet
Halley
TypeComet
Mass2.2 × 10¹⁴ kg
Diameter11 km
Orbital Radius2,680 million km
Orbital Period27,510 days
Rotation Period~52 hours
Known Moons0
Surface Gravity~0.0001 m/s²
Average Temp-70 °C
AtmosphereCO, CO2, H2O (coma)
Discovered ByEdmond Halley (predicted)
Discovery Year1705
About Halley
The most famous comet, visible from Earth every 75-79 years. Last appeared in 1986, next in 2061. First comet recognized as periodic by Edmond Halley in 1705. Its appearances have been recorded for over 2,000 years. Nucleus is potato-shaped, roughly 15 km long. Produces two types of tails: dust and ion.
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