OSIRIS, Rosetta’s Optical, Spectroscopic and Infrared Remote Imaging System, has been our all-seeing eye on Comet 67P/Churyumov-Gerasimenko, capturing nearly 68,000 high-resolution images of its nucleus and coma from all angles for 924 days. Here the OSIRIS team share some insights beyond the beauty of the images their camera returns. With inputs from Holger Sierks, OSIRIS principal investigator.
Numbers indicate combined totals for WAC and NAC. The breakdown is as follows: Shutter activations: NAC: 39,917; WAC: 110,308; Door operations: NAC: 11,560; WAC: 11,926; Filter/band pass changes: NAC: 72,727; WAC: 56,273. Of the 76,308 images taken at the comet, 67,905 are science images and the remainder technical images for calibration and testing.
OSIRIS has always had a big team: there are 97 team members today, and more than 300 people were involved – including industry partners – at the time the camera system was built. The instrument itself comprises two cameras – a wide- and narrow-angle camera, three electronics boxes, eight harnesses, and 22 subsystems, which were provided by nine European research institutes, plus industry, and with the support of six space agencies.
This massive endeavour ultimately resulted in a grand total of 98,219 images taken throughout the entire mission, including ...