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Discovery and designation
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| Discovered by | C. Kowal |
| Discovery site | Palomar Observatory |
| Discovery date | December 27, 1975 |
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Designations
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| MPC designation | 2102 |
| Named after | Tantalus |
| Alternate name(s) | 1975 YA |
| Epoch May 14, 2008 | |
| Ap | 1.675480355940624 |
| Peri | .9044414955741921 |
| Eccentricity | .2988613240023964 |
| Orbital period | 535.1348807900997 |
| Mean anomaly | 2.197759117592797 |
| Inclination | 64.01088599115477 |
| Longitude of ascending node | 94.38341186165387 |
| Argument of peri | 61.57071767945908 |
| Absolute magnitude (H) | 16.2 |
2102 Tantalus (1975 YA) is a Apollo asteroid discovered on December 27, 1975 by C. Kowal at Palomar Observatory.
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