OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) is the main scientific imaging system on the orbiter of the ESA spacecraft Rosetta for its mission to comet 67P/Churyumov–Gerasimenko. It was built by a consortium led by the German Max Planck Institute for Solar System Research.

OSIRIS was approved as an instrument for the spacecraft in 1996.^[1] It was launched in 2004 on Rosetta and was used until that mission concluded with the deactivation of the Rosetta spacecraft in September 2016.^[2][1]

The OSIRIS had two cameras, each with a different field of view. Both used a charge-coupled device (CCD).^[1] Each camera had the same type of CCD with a resolution of 2048 by 2048 pixels.^[1] The CCDs were supported by two digital signal processors that use solid-state memory.^[1] The computer used the VIRTUOSO operating system.^[1]

The fields of view were:^[1]

• Narrow angle, with a field of view of 2.4 by 2.4 degrees
• Wide angle, with a field of view of 12 by 12 degrees

It was launched on the Rosetta spacecraft in 2004, and first used in space in May 2004.^[1] In total, the OSIRIS cameras took 98,219 images during the entire mission, 76,308 of those at the comet. It operated for 22,176 hours.^[3]

• OSIRIS-REx (NASA asteroid probe)