Title

Overcoming the Challenges Associated with Image-Based Mapping of Small Bodies in Preparation for the OSIRIS-REx Mission to (101955) Bennu

Authors

D. N. DellaGiustina, The University of Arizona
C. A. Bennett, The University of Arizona
K. Becker, The University of Arizona
D. R. Golish, The University of Arizona
L. Le Corre, Planetary Science Institute
D. A. Cook, U.S. Geological Survey Astrogeology Science Center
K. L. Edmundson, U.S. Geological Survey Astrogeology Science Center
M. Chojnacki, The University of Arizona
S. S. Sutton, The University of Arizona
M. P. Milazzo, U.S. Geological Survey Astrogeology Science Center
B. Carcich, KinetX Space Navigation and Flight Dynamics Practice
M. C. Nolan, The University of Arizona
N. Habib, The University of Arizona
K. N. Burke, The University of Arizona
T. Becker, The University of Arizona
P. H. Smith, The University of Arizona
K. J. Walsh, Space Science and Engineering Division
K. Getzandanner, NASA Goddard Space Flight Center
D. R. Wibben, KinetX Space Navigation and Flight Dynamics Practice
J. M. Leonard, KinetX Space Navigation and Flight Dynamics Practice
M. M. Westermann, The University of Arizona
A. T. Polit, The University of Arizona
J. N. Kidd, The University of Arizona
C. W. Hergenrother, The University of Arizona
W. V. Boynton, The University of Arizona
J. Backer, U.S. Geological Survey Astrogeology Science Center
S. Sides, U.S. Geological Survey Astrogeology Science Center
J. Mapel, U.S. Geological Survey Astrogeology Science Center
K. Berry, U.S. Geological Survey Astrogeology Science Center
H. Roper, The University of Arizona
C. Drouet d'Aubigny, The University of Arizona
B. Rizk, The University of Arizona
M. K. Crombie, Indigo Information Services

Document Type

Article

Publication Date

12-1-2018

Abstract

The OSIRIS-REx Asteroid Sample Return Mission is the third mission in National Aeronautics and Space Administration (NASA)'s New Frontiers Program and is the first U.S. mission to return samples from an asteroid to Earth. The most important decision ahead of the OSIRIS-REx team is the selection of a prime sample-site on the surface of asteroid (101955) Bennu. Mission success hinges on identifying a site that is safe and has regolith that can readily be ingested by the spacecraft's sampling mechanism. To inform this mission-critical decision, the surface of Bennu is mapped using the OSIRIS-REx Camera Suite and the images are used to develop several foundational data products. Acquiring the necessary inputs to these data products requires observational strategies that are defined specifically to overcome the challenges associated with mapping a small irregular body. We present these strategies in the context of assessing candidate sample sites at Bennu according to a framework of decisions regarding the relative safety, sampleability, and scientific value across the asteroid's surface. To create data products that aid these assessments, we describe the best practices developed by the OSIRIS-REx team for image-based mapping of irregular small bodies. We emphasize the importance of using 3-D shape models and the ability to work in body-fixed rectangular coordinates when dealing with planetary surfaces that cannot be uniquely addressed by body-fixed latitude and longitude.

Publication Name

Earth and Space Science

Volume Number

5

First Page

929

Last Page

949

Issue Number

12

DOI

10.1029/2018EA000382

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