Primary Mirror Stats
Mirror Type: Segmented parabolic reflector
Width: 21.7 feet (6.6 meters) at its widest point
Area: 270 square feet (25 square meters)
Mass: 705 kilograms (1,555 pounds on Earth)
Focal Length: 414.4 feet (131.4 meters)
Optical Resolution: 0.07 arc-seconds, diffraction-limited at 2-micrometer wavelengths (0.0317 arc-second pixels)
Material: Beryllium, with a thin coating of gold
Number of Segments: 18 segments
Observatory Stats
Operating Temperature: -390 degrees Fahrenheit (40 kelvins; -235 degrees Celsius)
Observatory Mass: About 6,200 kilograms (13,650 pounds on Earth)
Sunshield Size: 69.5 by 46.5 feet (21.2 by 14.2 meters)
Launch Date: December 25, 2021 at 7:20 a.m. EST
Launch Vehicle: Ariane 5 rocket, provided by the European Space Agency
Launch Site: The Centre Spatial Guyanais (CSG) in Kourou, French Guiana
Location: Orbiting the Sun 1 million miles (1.5 million kilometers) from Earth at the Second Lagrange Point (L2)
Orbit Shape: As seen from Earth at midnight, the Webb orbit completes a large loop of 1,000,000 kilometers in diameter twice a year.
Transit Time to Orbit: About 1 month
Science Mission Lifetime: 5 years, with a goal of 10 years
Solar Array Power: 2,000 watts
Maximum Data Rate (Deep Space Network): 28 megabits per second (Mbps)