1P/Halley
🚀 Visited by spacecraft
📋 A written introduction is coming — for now this page shows official values only.
NowLIVE
距地球距离
35.0732 AU
5,246,875,107 km
光传播时间
4h 51m
按光速
日心距离
☉ 35.164 AU
预计星等 (JPL M1·K1)
25.6
大型望远镜·摄影
Computed 2026-11-04 01:33 UTC · planets astronomy-engine (VSOP87) · comets JPL elements (two-body) · NASA JPL Small-Body Database (sbdb.api) 2026-10-24 · Elements epoch 1968-01-20 · two-body approximation (no planetary perturbations)
Physical data
- Diameter
- 11 km
- Albedo
- 0.04
Orbit
- Orbit class (JPL)
- HTC — Halley-type Comet*
- Semi-major axis
- 17.9 AU
- Eccentricity
- 0.968
- Inclination
- 162°
- Perihelion distance
- 0.575 AU
- Aphelion distance
- 35.3 AU
- Orbital period
- 27,700 days
- Perihelion passage
- JD 2446469.974
- Earth MOID
- 0.0745 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- Yes
In everyday life
- About 11 km across — 2.8% of the 400 km Seoul–Busan expressway.
- One orbit takes about 27,700 Earth days (about 75.8 years).
- Sunlight needs about 2.5 hours to reach it on average (semi-major axis 17.9 AU) — versus about 8 min 19 s to Earth.