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Discovery and designation
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| Discovered by | Tsutomu Hioki and Nobuhiro Kawasato |
| Discovery site | Okutama |
| Discovery date | January 16, 1988 |
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Designations
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| MPC designation | 4100 |
| Alternate name(s) | 1988 BF |
| Epoch May 14, 2008 | |
| Ap | 3.3298138 |
| Peri | 2.6914840 |
| Eccentricity | 0.1060120 |
| Orbital period | 1908.0448524 |
| Mean anomaly | 30.49218 |
| Inclination | 11.12935 |
| Longitude of ascending node | 89.97467 |
| Argument of peri | 308.65339 |
| Absolute magnitude (H) | 11.4 |
4100 Sumiko (1988 BF) is a main-belt asteroid discovered on January 16, 1988 by Tsutomu Hioki and Nobuhiro Kawasato at Okutama.
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