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Discovery and designation
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| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg |
| Discovery date | March 7, 1924 |
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Designations
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| MPC designation | 2157 |
| Named after | Joseph Ashbrook |
| Alternate name(s) | A924 EF |
| Epoch May 14, 2008 | |
| Ap | 3.0925301 |
| Peri | 2.4736289 |
| Eccentricity | 0.1111900 |
| Orbital period | 1695.8477310 |
| Mean anomaly | 332.44632 |
| Inclination | 8.62814 |
| Longitude of ascending node | 349.53711 |
| Argument of peri | 266.99572 |
| Absolute magnitude (H) | 11.4 |
2157 Ashbrook (A924 EF) is a main-belt asteroid discovered on March 7, 1924 by K. Reinmuth at Heidelberg.
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