Winchester
747 Winchester (A913 EK)
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Diameter
- 171.71 km
- Rotation period
- 9.4146 hours
- Albedo
- 0.0503
- Absolute magnitude H
- 8.03 mag
- Spectral type (Tholen)
- PC
- Spectral type (SMASS)
- C
Orbit
- Orbit class (JPL)
- MBA — Main-belt Asteroid
- Semi-major axis
- 3 AU
- Eccentricity
- 0.34
- Inclination
- 18.2°
- Perihelion distance
- 1.98 AU
- Aphelion distance
- 4.02 AU
- Orbital period
- 1,900 days
- Perihelion passage
- JD 2461097.906
- Earth MOID
- 1.08 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- About 172 km across — 42.9% of the 400 km Seoul–Busan expressway.
- One orbit takes about 1,900 Earth days (about 5.2 years).
- Sunlight needs about 25 minutes to reach it on average (semi-major axis 3 AU) — versus about 8 min 19 s to Earth.
Worked out from this object's official values.