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Discovery and designation
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| Discovered by | Felix Aguilar Observatory |
| Discovery site | El Leoncito |
| Discovery date | October 10, 1974 |
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Designations
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| MPC designation | 2311 |
| Alternate name(s) | 1974 TA1 |
| Epoch May 14, 2008 | |
| Ap | 3.7921948 |
| Peri | 3.4737432 |
| Eccentricity | 0.0438280 |
| Orbital period | 2529.2452767 |
| Mean anomaly | 343.56572 |
| Inclination | 6.61850 |
| Longitude of ascending node | 156.72040 |
| Argument of peri | 189.80460 |
| Dimensions | 53.14km (diameter) |
| Geometric albedo | 0.0388 |
| Absolute magnitude (H) | 10.52 |
2311 El Leoncito (provisional designation: 1974 TA1) is an outer main belt asteroid discovered on October 10, 1974 by astronomers at Felix Aguilar Observatory at the Leoncito Astronomical Complex, Argentina. The asteroid's name derives from the complex's Spanish name, Complejo Astronómico El Leoncito. It is 53.14km in diameter.
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