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The Interface Region Imaging Spectrograph (IRIS) is a NASA Small Explorer Mission to observe how solar material moves, gathers energy, and heats up as it travels through a little-understood region in the sun's lower atmosphere.
Height 17.60 Meters
Max Stages 3
Mass To GTO 0 kg
Liftoff Thrust 580 kN
Diameter 1.27 Meters
Mass To LEO 443 kg
Liftoff Mass 23 Tonnes
Launch Success 28
Consecutive Success 25
Maiden Flight 1994-06-27
Launch Failures 3