Félix Aguilar Observatory

Félix Aguilar Observatory (Spanish: Observatorio Astronómico Félix Aguilar [oβseɾβaˈtoɾjo astɾoˈnomiko ˈfeliɣs aɣiˈlaɾ]; OAFA) is an astronomical observatory established in 1953, in San Juan Province, Argentina. In 1974, it was renamed to Carlos Ulrrico Cesco Astronomical Station (Spanish: Estación Astronómica Carlos Ulrrico Cesco [estaˈθjon astɾoˈnomika ˈkaɾlos ulˈriko ˈθesko]; EACUC).

Its primary observing facility is located in El Leoncito National Park in the west of San Juan Province. Also located in El Leoncito Park is the Leoncito Astronomical Complex. The observatory is operated by the School of Physical and Natural Sciences at the National University of San Juan in San Juan, Argentina. The original OAFA observatory buildings are located at the west end of the city.

OAFA is named after Félix Aguilar (1884–1943), an Argentine astronomer and engineer who was director of the La Plata Astronomical Observatory from 1919 to 1921, and again from 1934 until his death. EACUC was renamed after Carlos Ulrrico Cesco on the 25th anniversary of the beginning of observations in honour of his contributions to the founding and operation of the observatory.

The main-belt asteroid 3083 OAFA, was named after the discovery of the Felix Aguilar Observatory. The official naming citation was published on 21 November 1991 (M.P.C. 19333).