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Discovery
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| Discovered by | Y. Vaisala |
| Discovery site | Turku |
| Discovery date | December 28, 1940 |
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Designations
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| MPC designation | 1659 |
| Named after | Punkaharju |
| Alternate name(s) | 1940 YL |
| Epoch May 14, 2008 | |
| Ap | 3.5036048 |
| Peri | 2.0619086 |
| Eccentricity | 0.2590410 |
| Orbital period | 1695.5526831 |
| Mean anomaly | 244.03137 |
| Inclination | 16.48068 |
| Longitude of ascending node | 338.47089 |
| Argument of peri | 35.25584 |
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Physical characteristics
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| Albedo | 0.1654 |
| Absolute magnitude (H) | 10.10 |
1659 Punkaharju (1940 YL) is a main-belt asteroid discovered on December 28, 1940 by Yrjö Väisälä at Turku. It is named after the municipality of Punkaharju, Finland.
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