(1090) Sumida Main-belt Asteroid
Discovered on 20 February 1928 by O. Oikawa at Tokyo.
Where Sumida is today
Seen from above the solar system on 2026-10-14: Sumida is 2.52 au from the Sun and 3.26 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1090 |
| Provisional designation | 1928 DG |
| Orbit class | Main-belt Asteroid |
| Diameter | 13.0 km (#3,729 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.311 |
| Rotation period | 2.72 hours |
| Absolute magnitude (H) | 12.44 |
| Orbital period | 3.62 years |
| Semi-major axis | 2.36 au |
| Perihelion – aphelion | 1.84 – 2.88 au |
| Eccentricity | 0.221 |
| Inclination | 21.5° |
| Closest distance between its orbit and Earth's (MOID) | 0.862 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by O. Oikawa
← (1089) Tama · (1091) Spiraea →