IRTS (Infrared Telescope in Space)
The IRTS (Infrared Telescope in Space) was a highly-successful 15-cm-diameter orbiting infrared telescope developed by Japan's ISAS (Institute of
Space and Astronautical Science), launched aboard Japan's SFU (Space Flyer Unit), and retrieved by the Space Shuttle Endeavour on mission STS-72 in December 1995. Attached to the telescope were four
instruments: a near-infrared spectrometer (NIRS), a mid-infrared spectrometer
(MIRS), a far-infrared line mapper (FILM), and a far-infrared photometer
(FIRP). MIRS and FIRP were built in collaboration with American researchers.
IRTS operated from Mach. 30, 1995, to April 26, 1995, when its supply of cryogenic
coolant ran out.
||Mar. 18, 1995
||467 × 496 km × 29°
SATELLITES AND SPACE PROBES
AND SPACE PROBES