(4100) Sumiko Main-belt Asteroid
Discovered on 16 January 1988 by Hioki, T., Kawasato, N. at Okutama.
Where Sumiko is today
Seen from above the solar system on 2026-10-14: Sumiko is 3.26 au from the Sun and 3.96 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4100 |
| Provisional designation | 1988 BF |
| Orbit class | Main-belt Asteroid |
| Diameter | 15.6 km (#2,999 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.201 |
| Rotation period | 6.21 hours |
| Absolute magnitude (H) | 11.71 |
| Orbital period | 5.22 years |
| Semi-major axis | 3.01 au |
| Perihelion – aphelion | 2.68 – 3.34 au |
| Eccentricity | 0.110 |
| Inclination | 11.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.70 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 16 January 1988
- (4156) Okadanoboru
- (4218) Demottoni
- (4634) Shibuya
- (4703) Kagoshima
- (5348) Kennoguchi
- (5468) Hamatonbetsu
- (10731) Dollyparton
More named asteroids discovered by Hioki, T., Kawasato, N.
← (4099) Wiggins · (4101) Ruikou →