Primary Light-Gathering Mirror
21.3 feet (6.5 m) at its widest point
A total area of 270² feet (25²m)

Wavelength Range
Visible to mid-infrared (0.6 to 27+ micrometers)

Mission Lifetime
5–10 years

Instruments

• Near-infrared camera (0.6 to 5 micrometers)
• Multi-object near-infrared spectrometer (0.8 – 5 micrometers)
• Mid-infrared camera/spectrometer (5 to 27+ micrometers)
• Tunable filter camera (1.25 – 5 micrometers)

Operating Temperature
– 375°Fahrenheit (40 Kelvin; –233.3 °Celsius)

Payload Mass
About 15,000 lbs (6,800 kg)

Launch Vehicle
Ariane 5

Orbit
940,000 miles (1.5 million km) from Earth at the Second Lagrange Point (L2)

Transit Time to Orbit
About 3 months