(4223) Shikoku Main-belt Asteroid
Discovered on 7 May 1988 by T. Seki at Geisei.
Where Shikoku is today
Seen from above the solar system on 2026-10-14: Shikoku is 2.71 au from the Sun and 1.74 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4223 |
| Provisional designation | 1988 JM |
| Orbit class | Main-belt Asteroid |
| Diameter | 22.9 km (#1,869 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.175 |
| Rotation period | 9.14 hours |
| Absolute magnitude (H) | 10.97 |
| Orbital period | 5.22 years |
| Semi-major axis | 3.01 au |
| Perihelion – aphelion | 2.69 – 3.33 au |
| Eccentricity | 0.105 |
| Inclination | 9.24° |
| Closest distance between its orbit and Earth's (MOID) | 1.71 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by T. Seki
- (2396) Kochi
- (2571) Geisei
- (2582) Harimaya-Bashi
- (2621) Goto
- (2835) Ryoma
- (2880) Nihondaira
- (2961) Katsurahama
- (3150) Tosa
- (3182) Shimanto
- (3262) Miune
- (3431) Nakano
- (3785) Kitami
← (4222) Nancita · (4224) Susa →