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Discovery and designation
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| Discovered by | Natori and Urata |
| Discovery site | Yakiimo |
| Discovery date | August 15, 1991 |
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Designations
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| MPC designation | 4959 |
| Alternate name(s) | 1991 PA1 |
| Epoch May 14, 2008 | |
| Ap | 3.1629752 |
| Peri | 3.1299206 |
| Eccentricity | 0.0052527 |
| Orbital period | 2038.5869399 |
| Mean anomaly | 285.70930 |
| Inclination | 9.00486 |
| Longitude of ascending node | 128.95298 |
| Argument of peri | 284.38058 |
| Geometric albedo | 0.1082 |
| Absolute magnitude (H) | 10.80 |
4959 Niinoama (1991 PA1) is a main-belt asteroid discovered on August 15, 1991 by Natori and Urata at Yakiimo.
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