1P/Halley
1P/Halley (Comet). See its size, orbit and live position on a 3D map of the Solar System. Halley's Comet is the only known short-period comet that is consistently visible to the naked eye from Earth, appearing roughly every 74–79 years.
Halley's Comet is the only known short-period comet that is consistently visible to the naked eye from Earth, appearing roughly every 74–79 years. It last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-2061. Officially designated 1P/Halley, it is also commonly called Comet Halley, or sometimes simply Halley.
- Type: Comet
- Diameter: 11 km
- Orbital period: 75.9 years
- Eccentricity: 0.968