NSSDCA ID: 2016-055A-01
Mission Name: OSIRIS-RExThe OSIRIS-REX Camera Suite (OCAMS) is a set of three cameras designed to image asteroid Bennu from different distances at different resolutions. PolyCam is a long-range camera designed to image the asteroid from a distance up to two million km. MapCam will provide high-resolution maps of the asteroid's surface, and SamCam will document the maneuvers and acquisition by the TAGSAM sampling system. All cameras use identical detector arrays but have focal lengths separated by a factor of 5. The detector is a 1024 x 1024 active pixel CCD array with 6.5 x 8.5 micron pixels. The common electronics for all three cameras is mounted on the baseplate beneath the cameras. Total mass of the suite is 27.9 kg, including cabling and common electronics. Temperature control requires 13 W total, individual cameras each require about 32.2 W power, including common electronics, maximum power requirement is 52.9 W.
PolyCam is an 8-inch (203 mm) F/3.15 Ritchey-Chretien telescope with a mass of 9.09 kg. It has a 20 cm aperture and a field of view of 0.8 degrees. At infinity, its focal length is 629 mm and the detector resolution is 13.5 microrad/pixel. At 200 m it is 610 mm and resolution is 13.9 microrad/pixel. It can detect objects up to 12th magnitude.
MapCam is a 125-mm F/3.3 five-element refractive system with a mass of 3.83 kg. It has a 4 degree field of view and a resolution of 68 microrad/pixel. It has an 8 filter wheel which includes four color filters with 60- to 100- nm wide passbands based on the eight-color asteroid survey filter passbands. It also holds one pan filter optimized for ranges between 125 m and infinity and one optimized for 25 - 35 m.
SamCam is a 2.68 kg instrument with a 24 mm F/5.5 refractive system with a field of view of 20.8 degrees and a pixel resolution of 354 microrad. Nominal best-focus range is 3 to 30 m. A six-position filter wheel holds three identical pan filters with a 500 - 800 nm bandpass, two blocking filters, and a diopter lens to allow imaging at 2 m distance. It is tilted by 9.4 degrees from the other cameras so the TAGSAM head, when fully extended, is centered in the frame.
Mass: 27.9 kg
Power (avg): 32.2 W
Questions and comments about this experiment can be directed to: Dr. David R. Williams
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Christian d'Aubigny | Deputy Principal Investigator | University of Arizona | cyd@email.arizona.edu |
Dr. Charles W Fellows | Experiment Manager | University of Arizona | cfellows@lpl.arizona.edu |
Dr. Bashar Rizk | Principal Investigator | University of Arizona |