Quick Facts About Webb
Primary Mirror Stats
Segmented parabolic reflector
21.6 feet (6.5 m) at its widest point
269 square feet (25 m²)
1554 lbs (705 kg)
414.4 feet (131.4 m)
0.07 arc-seconds, diffraction-limited at 2-micrometer wavelengths (0.0317 arc-second pixels)
Beryllium, with a thin coating of gold
Number of Segments:
–387.7° Fahrenheit (40° Kelvin; –233.2° Celsius)
About 14,000 lbs (6,330 kg)
70 by 48 feet (21.2 by 14.6 m)
Ariane 5 rocket, provided by the European Space Agency
The Centre Spatial Guyanais (CSG) in Kourou, French Guiana
Orbiting the Sun 940,000 miles (1.5 million km) from Earth at the Second Lagrange Point (L2)
As seen from Earth at midnight, the Webb orbit completes a large loop of 1,000,000 km 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:
Maximum Data Rate (Deep Space Network):
Cost at Launch:
$8 billion, plus ESA and CSA contributions
0.6- 28.5 micrometers
• Near Infrared Camera (NIRCam) (0.6–5 micrometers)
• Near Infrared Spectograph (NIRSpec) (0.7–5 micrometers)
• Mid Infrared Instrument (MIRI) (5–28.5 micrometers)
• Fine Guidance Sensors/Near-Infrared Imager and Slitless Spectrograph (FGS/NIRISS) (0.6–5 micrometers)
Webb's sunshield is the size of a tennis court.
Webb's mirror is covered in a thin layer of gold.
While Webb can't observe Mercury or Venus, it will be able to study the solar system beyond the orbit of Mars, including Mars, the outer planets, icy moons, and Kuiper Belt Objects.