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Discovery
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| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg |
| Discovery date | January 14, 1942 |
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Designations
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| MPC designation | 1557 |
| Alternate name(s) | 1942 AD |
| Epoch May 14, 2008 | |
| Ap | 3.3186236 |
| Peri | 2.7025852 |
| Eccentricity | 0.1023114 |
| Orbital period | 1908.0025815 |
| Mean anomaly | 10.23057 |
| Inclination | 10.29048 |
| Longitude of ascending node | 355.35704 |
| Argument of peri | 0.01215 |
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Physical characteristics
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| Absolute magnitude (H) | 11.3 |
1557 Roehla (1942 AD) is a main-belt asteroid discovered on January 14, 1942 by K. Reinmuth at Heidelberg.
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