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Discovery and designation
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| Discovered by | E. W. Elst |
| Discovery site | European Southern Observatory |
| Discovery date | August 21, 1987 |
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Designations
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| MPC designation | 7400 |
| Named after | Nikolaus Lenau |
| Alternate name(s) | 1987 QW1 |
| Epoch May 14, 2008 | |
| Ap | 3.2443531 |
| Peri | 2.6680769 |
| Eccentricity | 0.0974686 |
| Orbital period | 1856.5320507 |
| Mean anomaly | 15.61589 |
| Inclination | 1.96635 |
| Longitude of ascending node | 161.01532 |
| Argument of peri | 180.69260 |
| Absolute magnitude (H) | 13.1 |
7400 Lenau (1987 QW1) is a main-belt asteroid discovered on August 21, 1987 by E. W. Elst at the European Southern Observatory, named after the Austrian-Hungarian poet Nikolaus Lenau.
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