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Discovery and designation
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| Discovered by | Spacewatch |
| Discovery site | Kitt Peak |
| Discovery date | September 18, 1998 |
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Designations
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| MPC designation | 14143 |
| Alternate name(s) | 1998 SQ18 |
| Epoch May 14, 2008 | |
| Ap | 2.7043860 |
| Peri | 2.0526614 |
| Eccentricity | 0.1370019 |
| Orbital period | 1339.8607379 |
| Mean anomaly | 241.91664 |
| Inclination | 5.95962 |
| Longitude of ascending node | 169.42442 |
| Argument of peri | 177.13201 |
| Absolute magnitude (H) | 14.6 |
14143 Hadfield (1998 SQ18) is a main-belt asteroid discovered on September 18, 1998 by Spacewatch at Kitt Peak.
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