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Discovery and designation
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| Discovered by | M. Koishikawa |
| Discovery site | Sendai Astronomical Observatory Ayashi station |
| Discovery date | February 13, 1991 |
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Designations
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| MPC designation | 11514 |
| Alternate name(s) | 1991 CO1 |
| Epoch May 14, 2008 | |
| Ap | 3.0971907 |
| Peri | 2.9444343 |
| Eccentricity | 0.0252840 |
| Orbital period | 1917.7150042 |
| Mean anomaly | 81.88158 |
| Inclination | 9.81620 |
| Longitude of ascending node | 179.98094 |
| Argument of peri | 347.04291 |
| Absolute magnitude (H) | 12.2 |
11514 Tsunenaga (1991 CO1) is a main-belt asteroid discovered on February 13, 1991 by M. Koishikawa at the Sendai Astronomical Observatory Ayashi station.
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