Physical parameters of Subaru Telescope
Observatory
- Latitude: +19° 49' 32'' N (NAD83)
- Longitude: 155° 28' 34'' W (NAD83)
- Altitude: 4139 m (Elevation axis is at 4163 m)
- Mounting: altitude-azimuth (Alt-Az)
Telescope
Telescope size
- Height: 22.2 m
- Maximum width: 27.2 m
- Weight: 555 t
Primary mirror
- Effective diameter: 8.2 m
- Thickness: 20 cm
- Weight: 22.8 t
- Material: ULE (ultra-low thermal expansion glass)
- Mean surface error: 14 nm
- Focal length: 15 m
- Reflectivity
Foci
- Primary focus: F/2.0 (with corrector)
- Cassegrain focus: F/12.2
- Nasmyth foci: F/12.6 (optical) and F/13.6 (infrared)
Enclosure
- Cylindrical enclosure rotating with telescope
- Height: 43 m
- Diameter at base: 40 m
- Weight: 2000 t
- Outer wall: Aluminum panel