Table Mountain Observatory

Table Mountain Observatory is an astronomical research station located high in the San Gabriel Mountains, equipped with a 1-meter telescope and additional reflector instruments. The facility operates from this elevated position to observe celestial objects and track near-Earth bodies.

The observatory was established in 1924 by the Smithsonian Institution to conduct atmospheric and astronomical measurements. NASA's Jet Propulsion Laboratory took over its operation in 1962 and has managed it since then.

The facility contributes to space research through partnerships with Pomona College, offering educational programs for physics and astronomy students.

The location offers year-round observation opportunities through its high elevation and stable sky conditions. Visitors should prepare for cool temperatures and variable mountain weather at this altitude.

The observatory has discovered more than 260 minor planets, with one officially named after the facility itself. This remarkable track record reflects the importance of this research station for planetary science.

Location: Big Pines

Inception: 1924

Official opening: 1968

Elevation above the sea: 2,285 m

Website: http://tmoa.jpl.nasa.gov

GPS coordinates: 34.38200,-117.68200

Latest update: December 10, 2025 20:03