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Discovery and designation
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| Discovered by | P. G. Comba |
| Discovery site | Prescott |
| Discovery date | March 18, 1997 |
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Designations
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| MPC designation | 13658 |
| Alternate name(s) | 1997 FB |
| Epoch May 14, 2008 | |
| Ap | 2.5237428 |
| Peri | 1.8316514 |
| Eccentricity | 0.1589044 |
| Orbital period | 1173.8014175 |
| Mean anomaly | 110.95027 |
| Inclination | 3.91718 |
| Longitude of ascending node | 181.07967 |
| Argument of peri | 68.70098 |
| Absolute magnitude (H) | 15.2 |
13658 Sylvester (1997 FB) is a main-belt asteroid discovered on March 18, 1997 by P. G. Comba at Prescott.
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