Enclosure (Dome):

-Mass/Weight: 673 metric tonnes/741 US Tons

-Diameter: 36 meters/118 feet

-Height of Dome Top Above Ground: 46 meters/150 feet

-Time for Complete Revolution: 2 minutes

-Size of Thermal Vents: 10 meters/32.8 feet wide (fully open), each vent covers 120

degrees of the dome’s circumference.

-Width of Observing Slit: 10 meters/32.8 feet

-Composition of Outer Dome Skin: Steel with aluminum paint for thermal stability

-Construction: Began in May 1995 (Mauna Kea)