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Discovery and designation
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| Discovered by | L. G. Karachkina |
| Discovery site | Crimean Astrophysical Observatory |
| Discovery date | September 27, 1981 |
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Designations
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| MPC designation | 19119 |
| Alternate name(s) | 1981 SG3 |
| Epoch May 14, 2008 | |
| Ap | 2.9748033 |
| Peri | 1.8564071 |
| Eccentricity | 0.2314940 |
| Orbital period | 1371.3153661 |
| Mean anomaly | 43.44007 |
| Inclination | 3.76948 |
| Longitude of ascending node | 280.09578 |
| Argument of peri | 74.38231 |
| Absolute magnitude (H) | 14.7 |
19119 Dimpna (1981 SG3) is a main-belt asteroid discovered on September 27, 1981 by L. G. Karachkina at the Crimean Astrophysical Observatory.
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