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Discovery and designation
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| Discovered by | K. J. Lawrence |
| Discovery site | Palomar |
| Discovery date | October 10, 1991 |
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Designations
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| MPC designation | 6561 |
| Alternate name(s) | 1991 TC4 |
| Epoch May 14, 2008 | |
| Ap | 3.0662588 |
| Peri | 2.1123616 |
| Eccentricity | 0.1841991 |
| Orbital period | 1521.8594823 |
| Mean anomaly | 23.02951 |
| Inclination | 13.65524 |
| Longitude of ascending node | 163.28913 |
| Argument of peri | 177.04589 |
| Absolute magnitude (H) | 13.6 |
6561 Gruppetta (1991 TC4) is a main-belt asteroid discovered on October 10, 1991 by K. J. Lawrence at Palomar.
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