Sacramento Peak Observatory
A facility of the National Solar
Observatory (NSO), located 2,800 meters up in the Lincoln National Forest
of the Sacramento Mountains, near Sunspot (65 km southeast of Alamogordo),
New Mexico. Its largest instrument is the Richard B. Dunn Solar Telescope,
a vacuum tower telescope, 108.5 m high – only the top 41.5 m of which
rises above ground level – with a 0.76-m entrance window and a 1.6-m
main mirror. Other instruments include the John W. Evans Solar Facility,
equipped with a 0.4-m coronagraph and
a 0.3-m coelostat, and the Hilltop Dome
Facility, which operates a number of solar patrol cameras and test cameras.
The Observatory was founded in 1949 by the U.S. Air Force Cambridge Research
Laboratories and became part of the NSO when that body was founded in 1984.