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Discovery and designation
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| Discovered by | P. G. Comba |
| Discovery site | Prescott |
| Discovery date | July 8, 1997 |
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Designations
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| MPC designation | 9669 |
| Alternate name(s) | 1997 NC3 |
| Epoch May 14, 2008 | |
| Ap | 3.8371494 |
| Peri | 2.5985182 |
| Eccentricity | 0.1924635 |
| Orbital period | 2108.3555360 |
| Mean anomaly | 241.05818 |
| Inclination | 0.44451 |
| Longitude of ascending node | 268.55682 |
| Argument of peri | 126.78865 |
| Absolute magnitude (H) | 13.1 |
9669 Symmetria (1997 NC3) is an outer main-belt asteroid discovered on July 8, 1997 by P. G. Comba at Prescott.
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