99P/Kowal 1
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Diameter
- 10.2 km
Orbit
- Orbit class (JPL)
- JFc — Jupiter-family Comet
- Semi-major axis
- 6.13 AU
- Eccentricity
- 0.23
- Inclination
- 4.34°
- Perihelion distance
- 4.72 AU
- Aphelion distance
- 7.54 AU
- Orbital period
- 5,550 days
- Perihelion passage
- JD 2459677.566
- Earth MOID
- 3.72 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- About 10 km across — 2.6% of the 400 km Seoul–Busan expressway.
- One orbit takes about 5,550 Earth days (about 15.2 years).
- Sunlight needs about 51 minutes to reach it on average (semi-major axis 6.1 AU) — versus about 8 min 19 s to Earth.
Worked out from this object's official values.