20D/Westphal
📋 A written introduction is coming — for now this page shows official values only.
Orbit
- Orbit class (JPL)
- HTC — Halley-type Comet*
- Semi-major axis
- 15.6 AU
- Eccentricity
- 0.92
- Inclination
- 40.9°
- Perihelion distance
- 1.25 AU
- Aphelion distance
- 30 AU
- Orbital period
- 22,600 days
- Perihelion passage
- JD 2420098.290
- Earth MOID
- 0.468 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- Yes
In everyday life
- One orbit takes about 22,600 Earth days (about 61.9 years).
- Sunlight needs about 2.2 hours to reach it on average (semi-major axis 15.6 AU) — versus about 8 min 19 s to Earth.
- At its closest it comes 1.3 AU from the Sun — 1.3 times the Earth–Sun distance.
Worked out from this object's official values.