(4903) Ichikawa Main-belt Asteroid
Discovered on 20 October 1989 by Mizuno, Y., Furuta, T. at Kani.
Where Ichikawa is today
Seen from above the solar system on 2026-10-14: Ichikawa is 3.38 au from the Sun and 4.34 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4903 |
| Provisional designation | 1989 UD |
| Orbit class | Main-belt Asteroid |
| Diameter | 14.8 km (#3,190 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.117 |
| Rotation period | 20.4 hours |
| Absolute magnitude (H) | 12.81 |
| Orbital period | 5.57 years |
| Semi-major axis | 3.14 au |
| Perihelion – aphelion | 2.55 – 3.73 au |
| Eccentricity | 0.187 |
| Inclination | 2.54° |
| Closest distance between its orbit and Earth's (MOID) | 1.55 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.