Table Mountain Observatory (TMO) is an astronomical observation facility operated by NASA's Jet Propulsion Laboratory (California Institute of Technology).

[1][2] TMO is part of JPL's Table Mountain Facility (TMF).

The site was first used by the Smithsonian Institution in 1924, which conducted atmospheric, solar, and astronomical observations for many years.

[3][2] The observatory conducts high-precision astrometric observations to support NASA and international spacecraft mission navigation, confirmation and recovery of near-Earth objects such as comets and asteroids that may potentially impact the Earth, and technology development.

The MPC also directly credits TMO with the discovery of one numbered main-belt asteroid (see table).