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Discovery and designation
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| Discovered by | Purple Mountain Observatory |
| Discovery site | Nanking |
| Discovery date | October 24, 1965 |
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Designations
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| MPC designation | 2398 |
| Named after | Jilin |
| Alternate name(s) | 1965 UD2 |
| Epoch May 14, 2008 | |
| Ap | 2.9570703 |
| Peri | 1.8296595 |
| Eccentricity | 0.2355284 |
| Orbital period | 1352.4206978 |
| Mean anomaly | 147.02026 |
| Inclination | 3.73591 |
| Longitude of ascending node | 88.15785 |
| Argument of peri | 11.35525 |
| Absolute magnitude (H) | 13.6 |
2398 Jilin (1965 UD2) is a main-belt asteroid discovered on October 24, 1965 by Purple Mountain Observatory at Nanking.
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