17P/Holmes
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Diameter
- 3.42 km
Orbit
- Orbit class (JPL)
- JFc — Jupiter-family Comet
- Semi-major axis
- 3.63 AU
- Eccentricity
- 0.43
- Inclination
- 19.1°
- Perihelion distance
- 2.07 AU
- Aphelion distance
- 5.19 AU
- Orbital period
- 2,520 days
- Perihelion passage
- JD 2456743.220
- Earth MOID
- 1.07 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- About 3 km across — 0.9% of the 400 km Seoul–Busan expressway.
- One orbit takes about 2,520 Earth days (about 6.9 years).
- Sunlight needs about 30 minutes to reach it on average (semi-major axis 3.6 AU) — versus about 8 min 19 s to Earth.
Worked out from this object's official values.