Subaru Telescope

The Subaru Telescope is an optical facility on Mauna Kea in Hawaii, United States, housing a primary mirror that measures 8.2 meters (27 feet) across and works with both visible and infrared wavelengths. The dome and technical structure sit at high altitude on a volcanic peak, supporting nine specialized instruments for observing objects across the sky.

Construction began in 1991 under the National Astronomical Observatory of Japan and reached completion in 1998. The first scientific observations took place in 1999, opening a new chapter for Japanese research on the Hawaiian summit.

The name refers to the Pleiades star cluster and reflects the Japanese roots of the observatory. Visitors experience a meeting point where traditional Asian sky observation meets modern technology on Hawaiian ground.

Scientists book observation time in advance to work with the instruments available at the site. The high altitude can cause breathing difficulties, so visitors should spend time adjusting beforehand and bring plenty of water.

The mirror system relies on 261 computer-controlled actuators that make tiny adjustments as the orientation shifts during observations. This active control maintains optical quality even when the instrument tilts and moves throughout the night.

Location: Mauna Kea

Location: Hawaii

Inception: 1997

Elevation above the sea: 4,139 m

Diameter: 8.2 m

Operator: National Astronomical Observatory of Japan

Part of: Mauna Kea Observatories, National Astronomical Observatory of Japan

Website: http://naoj.org

GPS coordinates: 19.82560,-155.47608

Latest update: December 19, 2025 22:12