A high-resolution global basemap of (101955) Bennu

In early 2019, NASA's OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer) mission surveyed asteroid (101955) Bennu with a collection of instruments, including the OSIRIS-REx Camera Suite (OCAMS) PolyCam imager. Using PolyCam panchromatic images...

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Bibliographic Details
Published in:	Icarus (New York, N.Y. 1962) Vol. 357; p. 113690
Main Authors:	Bennett, C.A., DellaGiustina, D.N., Becker, K.J., Becker, T.L., Edmundson, K.L., Golish, D.R, Bennett, R.J., Burke, K.N., Cue, C.N.U., Clark, B.E., Contreras, J., Deshapriya, J.D.P., d'Aubigny, C. Drouet, Fitzgibbon, G., Jawin, E.R., Nolan, T.Q., Porter, N.A., Riehl, M.M., Roper, H.L., Rizk, B., Tang, Y., Zeszut, Z., Gaskell, R.W., Palmer, E.E., Weirich, J.R., Al Asad, M.M., Philpott, L., Daly, M.G., Barnouin, O.S., Enos, H.L., Lauretta, D.S.
Format:	Journal Article
Language:	English
Published:	Elsevier Inc 15-03-2021 Elsevier
Subjects:	Asteroid surfaces Asteroids Image processing Near-earth objects Sciences of the Universe Asteroid surfaces Image processing Near-earth objects Asteroids
Online Access:	Get full text
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Summary:	In early 2019, NASA's OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security–Regolith 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 5 cm 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. Here we present the global basemap of Bennu and discuss the image processing techniques used to construct a high-resolution mosaic of an irregular small body. •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.
ISSN:	0019-1035 1090-2643
DOI:	10.1016/j.icarus.2020.113690