1P/Halley

Discovered 1705-01-01 · Edmond Halley (orbital prediction)

Most famous periodic comet; last perihelion 1986, next ~2061

Mean Radius

11 km

Gravity

0.00 m/s²

Temperature

170 K (-103°C)

Orbital Period

27509.0 d

Distance

17.834 AU

Physical Properties

Mean Radius11 km

Mass2.2000 × 10^14 kg

Surface Gravity0.00 m/s²

Density0.600 g/cm³

Escape Velocity0.00 km/s

Mean Temperature170 K (-103°C)

Axial Tilt0.00°

Rotation Period170.40 h

AtmosphereYes

Ring SystemNone

Orbital Elements (J2000)

Semi-major Axis17.834000 AU

Eccentricity0.967140

Inclination162.2630°

Orbital Period27509.00 days

Asc. Node (Ω)58.42000°

Arg. Perihelion (ω)111.33300°

Mean Anomaly (M₀)38.38000°

Perihelion0.586 AU

Aphelion35.080 AU

Data Sources

Physical & orbital data: NASA/JPL Planetary Fact Sheets · Orbital elements: NASA JPL Horizons System (J2000 epoch)