Site Data (Mauna Kea):

Latitude: 19 degrees 49 minutes 25.7 seconds North

Longitude: 155 degrees 28 minutes 08.6 seconds West

Altitude (at Gemini’s altitude bearing): 4214 meters/13,824 feet

Geological Status: Dormant volcano (last eruption about 3,300 years ago); world’s tallest

mountain from base (seafloor) to summit. 4,572 meters/15,000 feet from sea-floor to

sea-level, another 4.205 meters/13,796 feet from sea-level to summit.

Average January Temperature (1969-77 data): 0.3 degrees C/ 32.5 degrees F

Average June Temperature (1969-77 data): 5.0 degrees C/41.0 degrees F

Average Annual Precipitation (1969-77 data): 14.17 cm/5.58 inches

Highest Recorded Wind: Exceeding 184 mph/84 m/sec (limited due to equipment

capability)

Breathable Oxygen Content: 40% less than at sea-level