Isis
42 Isis (A856 KB)
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Diameter
- 110.997 km
- Rotation period
- 13.59 hours
- Albedo
- 0.139
- Absolute magnitude H
- 7.69 mag
- Spectral type (Tholen)
- S
- Spectral type (SMASS)
- L
Orbit
- Orbit class (JPL)
- MBA — Main-belt Asteroid
- Semi-major axis
- 2.44 AU
- Eccentricity
- 0.222
- Inclination
- 8.5°
- Perihelion distance
- 1.9 AU
- Aphelion distance
- 2.99 AU
- Orbital period
- 1,400 days
- Perihelion passage
- JD 2460601.818
- Earth MOID
- 0.904 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- About 111 km across — 27.7% of the 400 km Seoul–Busan expressway.
- One orbit takes about 1,400 Earth days (about 3.8 years).
- Sunlight needs about 20 minutes to reach it on average (semi-major axis 2.4 AU) — versus about 8 min 19 s to Earth.
Worked out from this object's official values.