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Hale Telescope

(5.1m reflector telescope in California)

Hale Telescope is a 5.1m (200 inch) reflector telescope at Palomar Observatory. It began operation in 1949 and was the largest reflecting telescope until 1976 when the BTA-6 was built. It is named for George Ellery Hale who orchestrated its construction.

The telescope has an equatorial mount, using a Serrurier truss, a design that maintains optical alignment despite gravity. The mirror is a glass (Pyrex) monolithic mirror made by Corning Glass Works. It is designed so it can function as a Cassegrain reflector, a prime focus reflector, or a coudé focus telescope reflector.

Among its current instruments:

Future plans:

Instruments listed in the past:


Referenced by:
angular resolution
Atlas of Peculiar Galaxies (APG)
coudé focus telescope
equatorial mount
monolithic mirror
Palomar 48 Inch Telescope (P48)
Palomar Four-filter Survey (PC)
prime focus
reflector telescope
segmented mirror
TripleSpec (TSpec)