Telescope Information
IDENTIFIER urn:nasa:pds:context:telescope:naoj-hawaii.subaru_8m2::1.2
NAME National Astronomical Observatory of Japan at Mauna Kea, Hawai'i Subaru 8.2 m Telescope
DESCRIPTION The Subaru Telescope is a Ritchey-Chretien reflecting telescope. Instruments can be mounted at a Cassegrain focus below the primary mirror; at either of two Nasmyth focal points in enclosures on the sides of the telescope mount, to which light can be directed with a tertiary mirror; or at the prime focus in lieu of a secondary mirror, an arrangement rare on large telescopes, to provide a wide field of view suited to deep wide-field surveys. Longitude and latitude, above, are provided in the NAD83 coordinate system. Altitude elevation axis is at 4163 m. Telescope size measures 22.2 m in height, with a maximum width of 27.2 m, weighing 555 t. The primary mirror has an effective diameter of 8.2 m with a thickness of 22 cm weighing 22.8 t. Composed of ULE (ultra-low thermal expansion glass), the mean surface error is 14 nm, with a focal length of 15 m. Various foci are as follows: primary focus is F/2.0 (with corrector); Cassegrain focus is F/12.2; Nasmyth foci are F/12.6 (optical) and F/13.6 (infrared). All is contained within a cylindrical enclosure rotating with telescope, with a height of 43 m and diameter at the base of 40 m, weighing 2000 t.
FACILITY National Astronomical Observatory of Japan at Mauna Kea, Hawaii
APERTURE 8.2
LONGITUDE 204.5239
LATITUDE 19.82556
ALTITUDE
COORIDINATE SOURCE
INVESTIGATION(S)
INSTRUMENT(S) Cooled Mid-Infrared Camera and Spectrometer