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Bennu OSIRIS-REx OCAMS Global PAN Mosaic 5cm v1

In early 2019, NASA's OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and SecurityRegolith Explorer) mission surveyed asteroid (101955) Bennu with a collection of instruments, including the OSIRIS-REx Camera Suite (OCAMS) PolyCam imager. Using PolyCam panchromatic images, we constructed a globally controlled basemap of Bennu at an approximate ground sample distance of 5cm (5cm/pixel) with a mean spatial accuracy of ~30 cm. The basemap was photometrically normalized using a Minneart phase angle correction. New mapping methods were developed to combine images of Bennu's irregular shape and extremely rough surface into a nearly seamless mosaic. For more see Bennett (2020).

Highlights:

  • We produced a global basemap of asteroid Bennu at a ground sample distance of 5 cm.
  • New methods were developed to deal with Bennu's rough surface and irregular shape.
  • Images were rectified to a 3D digital terrain model with a mean facet size of 80 cm.
  • Images were photometrically normalized to 30° phase angle using a Minneart model.
  • Overlaps were masked along natural feature boundaries for a nearly seamless result.

This download is an 8bit version of the original mosaic. The mapping used to convert to 8bit was a linear stretch from 0.0 - 0.044 to 1 - 254, maintaining 0 as NoDATA. There are several related images available for download including the original 32bit mosaic in I/F (reflectance). You can find those here. This includes:

References:

Bennett, C. A., DellaGiustina, D. N., Becker, K. J., Becker, T. L., Edmundson, T. L., Golish D. R., et. al. (2020). A high-resolution global basemap of (101955) Bennu. Icarus. Advance online publication. https://doi.org/10.1016/j.icarus.2020.113690

Lauretta, D. S., Balram-Knutson, S. S., Beshore, E., Boynton, W. V., Drouet d'Aubigny, C., DellaGiustina, D. N., et al. (2017). OSIRIS-REx: Sample Return from Asteroid (101955) Bennu. Space Science Review, 212, 925-984. https://doi.org/10.1007/s11214-017-0405-1

Williams, B., Antreasian, P., Carranza, E., Jackman, C., Leonard, J., Nelson, D., Page, B., et al. (2018). OSIRIS-REx Flight Dynamics and Navigation Design. Space Science Review, 214(69). https://doi.org/10.1007/s11214-018-0501-x

Bierhaus, E. B., Clark, B. C., Harris, J. W., Payne, K. S., Dubisher, R. D., Wurts, D. W., Hund, R. A., et al. (2018). The OSIRIS-REx Spacecraft and the Touch-and-Go Sample Acquisition Mechanism (TAGSAM). Space Science Reviews, 214(107). https://doi.org/10.1007/s11214-018-0521-6

Berry, K., Sutter, B., May, A., Williams, K., Barbee, B. W., Beckman, M., & Williams, B. (2013). OSIRIS-REx Touch-and-gGo (TAG) Mission Design and Analysis. Paper presented at the 36th Annual AAS Guidance and Control Conference, American Astronautical Society, Rocky Mountain Section, Breckenridge, Colorado, USA. https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20130013409.pdf

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