Protogeneia
147 Protogeneia (A875 NA)
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Diameter
- 132.93 km
- Rotation period
- 7.8528 hours
- Albedo
- 0.0492
- Absolute magnitude H
- 8.72 mag
- Spectral type (Tholen)
- C
- Spectral type (SMASS)
- C
Orbit
- Orbit class (JPL)
- MBA — Main-belt Asteroid
- Semi-major axis
- 3.14 AU
- Eccentricity
- 0.0218
- Inclination
- 1.93°
- Perihelion distance
- 3.07 AU
- Aphelion distance
- 3.21 AU
- Orbital period
- 2,030 days
- Perihelion passage
- JD 2461151.046
- Earth MOID
- 2.06 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- About 133 km across — 33.2% of the 400 km Seoul–Busan expressway.
- One orbit takes about 2,030 Earth days (about 5.6 years).
- Sunlight needs about 26 minutes to reach it on average (semi-major axis 3.1 AU) — versus about 8 min 19 s to Earth.
Worked out from this object's official values.