The REgolith X-Ray Imaging Spectrometer (REXIS) for OSIRIS-REx: identifying regional elemental enrichment on asteroids
Author(s)Allen, Branden; Grindlay, Jonathan E.; Hong, Jaesub; Inamdar, Niraj K.; Bautz, Marshall W.; Kissel, Steve E.; Oprescu, Miruna; Induni, Nicholas; Masterson, Rebecca A.; Chodas, Mark A.; Smith, Matthew William; Villasenor, Jesus Noel Samonte; Kissel, Steve E.; Binzel, Richard P; ... Show more Show less
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The OSIRIS-REx Mission was selected under the NASA New Frontiers program and is scheduled for launch in September of 2016 for a rendezvous with, and collection of a sample from the surface of asteroid Bennu in 2019. 101955 Bennu (previously 1999 RQ36) is an Apollo (near-Earth) asteroid originally discovered by the LINEAR project in 1999 which has since been classified as a potentially hazardous near-Earth object. The REgolith X-Ray Imaging Spectrometer (REXIS) was proposed jointly by MIT and Harvard and was subsequently accepted as a student led instrument for the determination of the elemental composition of the asteroid's surface as well as the surface distribution of select elements through solar induced X-ray fluorescence. REXIS consists of a detector plane that contains 4 X-ray CCDs integrated into a wide field coded aperture telescope with a focal length of 20 em for the detection of regions with enhanced abundance in key elements at 50 m scales. Elemental surface distributions of approximately 50-200 m scales can be detected using the instrument as a simple collimator. An overview of the observation strategy of the REXIS instrument and expected performance are presented here.
DepartmentMassachusetts Institute of Technology. Department of Aeronautics and Astronautics; Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences; Massachusetts Institute of Technology. Space Systems Laboratory; MIT Kavli Institute for Astrophysics and Space Research
Proceedings of SPIE--the International Society for Optical Engineering
Allen, Branden, Jonathan Grindlay, Jaesub Hong, Richard P. Binzel, Rebecca Masterson, Niraj K. Inamdar, Mark Chodas, et al. “The REgolith X-Ray Imaging Spectrometer (REXIS) for OSIRIS-REx: Identifying Regional Elemental Enrichment on Asteroids.” Edited by Mark A. Kahan and Marie B. Levine. Optical Modeling and Performance Predictions VI (September 27, 2013). © 2013 SPIE
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