1090 Sumida
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| Discovery A | |
|---|---|
| Discoverer | Okuro Oikawa |
| Discovery date | February 20, 1928 |
| Alternate designations B |
1928 DG |
| Category | |
| Orbital elements C | |
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| Eccentricity (e) | 0.2213034 |
| Semi-major axis (a) | |
| Perihelion (q) | 1.8372244 AU |
| Aphelion (Q) | |
| Orbital period (P) | |
| Mean orbital speed | |
| Inclination (i) | 21.5146787° |
| Longitude of the ascending node (Ω) |
147.6050658° |
| Argument of perihelion (ω) |
337.3237229° |
| Mean anomaly (M) | |
| Physical characteristics D | |
| Dimensions | 42 km |
| Mass | |
| Density | |
| Surface gravity | |
| Escape velocity | |
| Rotation period | |
| Spectral class | |
| Absolute magnitude | 12.49 |
| Albedo (geometric) | 0.15 |
| Mean surface temperature |
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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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