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Discovery and designation
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| Discovered by | H. E. Holt |
| Discovery site | Palomar |
| Discovery date | September 14, 1990 |
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Designations
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| MPC designation | 5439 |
| Alternate name(s) | 1990 RW |
| Epoch May 14, 2008 | |
| Ap | 4.5812847 |
| Peri | 3.3203027 |
| Eccentricity | 0.1595859 |
| Orbital period | 2868.3026031 |
| Mean anomaly | 103.46016 |
| Inclination | 1.23578 |
| Longitude of ascending node | 351.66918 |
| Argument of peri | 330.12091 |
| Geometric albedo | 0.0358 |
| Absolute magnitude (H) | 11.70 |
5439 Couturier (1990 RW) is an outer main-belt asteroid discovered on September 14, 1990 by H. E. Holt at Palomar.
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