28P/Neujmin 1
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Diameter
- 21.4 km
- Albedo
- 0.025
Orbit
- Orbit class (JPL)
- JFc — Jupiter-family Comet
- Semi-major axis
- 6.97 AU
- Eccentricity
- 0.773
- Inclination
- 14.3°
- Perihelion distance
- 1.58 AU
- Aphelion distance
- 12.4 AU
- Orbital period
- 6,710 days
- Perihelion passage
- JD 2459285.542
- Earth MOID
- 0.571 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- About 21 km across — 5.4% of the 400 km Seoul–Busan expressway.
- One orbit takes about 6,710 Earth days (about 18.4 years).
- Sunlight needs about 58 minutes to reach it on average (semi-major axis 7 AU) — versus about 8 min 19 s to Earth.