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Discovery and designation
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| Discovered by | E. F. Helin |
| Discovery site | Palomar |
| Discovery date | May 11, 1991 |
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Designations
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| MPC designation | 7290 |
| Alternate name(s) | 1991 JY1 |
| Epoch May 14, 2008 | |
| Ap | 3.1401523 |
| Peri | 1.9718577 |
| Eccentricity | 0.2285392 |
| Orbital period | 1492.5915220 |
| Mean anomaly | 358.08095 |
| Inclination | 24.75618 |
| Longitude of ascending node | 212.99894 |
| Argument of peri | 116.67284 |
| Absolute magnitude (H) | 12.5 |
7290 Johnrather (1991 JY1) is a main-belt asteroid discovered on May 11, 1991 by E. F. Helin at Palomar.
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