4138 Kalchas
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Discovery and designation
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| Discovered by | van Houten and Gehrels |
| Discovery site | Palomar |
| Discovery date | September 19, 1973 |
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Designations
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| MPC designation | 4138 |
| Alternative names[1] | 1973 SM |
| Epoch May 14, 2008 | |
| Ap | 5.3811370 |
| Peri | 4.9236814 |
| Eccentricity | 0.0443924 |
| Orbital period | 4271.8298217 |
| Mean anomaly | 340.19086 |
| Inclination | 2.10048 |
| Longitude of ascending node | 208.02832 |
| Argument of peri | 164.11051 |
| Absolute magnitude | 9.8 |
4138 Kalchas (1973 SM) is a Jupiter Trojan discovered on September 19, 1973 by van Houten and Gehrels at Palomar.
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