Ida
243 Ida (A884 SB)
🚀 Visited by spacecraft
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Diameter
- 32 km
- Rotation period
- 4.634 hours
- Albedo
- 0.262
- Absolute magnitude H
- 10.06 mag
- Spectral type (Tholen)
- S
- Spectral type (SMASS)
- S
Orbit
- Orbit class (JPL)
- MBA — Main-belt Asteroid
- Semi-major axis
- 2.86 AU
- Eccentricity
- 0.0461
- Inclination
- 1.13°
- Perihelion distance
- 2.73 AU
- Aphelion distance
- 3 AU
- Orbital period
- 1,770 days
- Perihelion passage
- JD 2460956.435
- Earth MOID
- 1.75 AU
Earth approach
- Potentially hazardous (PHA)
- No
- Near-Earth object (NEO)
- No
In everyday life
- About 32 km across — 8% of the 400 km Seoul–Busan expressway.
- One orbit takes about 1,770 Earth days (about 4.8 years).
- Sunlight needs about 24 minutes to reach it on average (semi-major axis 2.9 AU) — versus about 8 min 19 s to Earth.
Worked out from this object's official values.