21656 Knuth
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Discovery and designation
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| Discovered by | P. Pravec and P. Kušnirák |
| Discovery site | Ondrejov |
| Discovery date | August 9, 1999 |
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Designations
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| MPC designation | 21656 |
| Alternative names[1] | 1999 PX1 |
| Epoch May 14, 2008 | |
| Ap | 3.3200848 |
| Peri | 2.1000056 |
| Eccentricity | 0.2251031 |
| Orbital period | 1629.5332994 |
| Mean anomaly | 348.73309 |
| Inclination | 9.25301 |
| Longitude of ascending node | 130.32996 |
| Argument of peri | 204.04123 |
| Absolute magnitude | 14.7 |
21656 Knuth (1999 PX1) is a Main-belt Asteroid discovered on August 9, 1999 by P. Pravec and P. Kušnirák at Ondrejov.
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