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Discovery
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| Discovered by | Okuro Oikawa |
| Discovery date | February 20, 1928 |
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Designations
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| Named after | Sumida River |
| Alternate name(s) | 1928 DG |
| Epoch JD 2445600.5 | |
| Perihelion | 1.8372244 AU |
| Eccentricity | 0.2213034 |
| Inclination | 21.5146787° |
| Longitude of ascending node | 147.6050658° |
| Argument of perihelion | 337.3237229° |
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Physical characteristics
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| Dimensions | 42 km |
| Albedo | 0.15 |
| Absolute magnitude (H) | 12.49 |
1090 Sumida is a minor planet orbiting the Sun. Initially it received the designation 1928 DG. It is now named after the Sumida River. The numerical designation indicates this was the 1090th asteroid discovered.
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