Palomar Observatory

Palomar Observatory (aka Mount Palomar Observatory) is an observatory near San Diego, California, owned and operated by CalTech. Among its telescopes:

• Hale Telescope (5.1 m).
• Palomar 48 Inch Telescope (P48) (1.2-m Schmidt camera used for Palomar Observatory Sky Survey, the basis of many catalogs, and currently used for the Zwicky Transient Facility (ZTF)).
• Palomar 60-inch Telescope (60 inch, now automated).
• Palomar Testbed Interferometer (PTI) (past optical interferometer experiment).
• 18 inch Schmidt Camera (P18, past; the observatory's first operational telescope, used from 1936 into the mid 1990s).
• Gattini-IR (30 cm IR survey telescope).