Bennu OSIRIS-REx OCAMS Global ALBEDO Mosaic 6.25cm v6
In 2019, NASA's OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security – Regolith Explorer) mission globally surveyed asteroid (101955) Bennu with a collection of instruments, including the OSIRIS-REx Camera Suite (OCAMS) PolyCam imager. Using PolyCam panchromatic images acquired at low phase angles (~8°), we constructed a near-global albedo map of Bennu with a ground sample distance of 6.25 cm/pixel (Golish et al. 2021a). The images were photometrically normalized using the published ROLO phase function and Lommel-Seeliger disk function for Bennu (Golish et al., 2021b) and orthorectified using the v20 global shape model (Barnouin, et al. (2020); Daly et al. (2020), produced by the OSIRIS-Rex Laser Altimeter (OLA; Daly et al. (2017)), with a ground sample distance of 88 cm. Mapping and global control methods were adapted from Bennett et al. (2021) and Edmundson et al. (2020).
Highlights:
- We produced a near-global albedo map of asteroid Bennu at a ground sample distance of 6.25 cm, covering ~±55° latitude.
- Images were rectified to a 3D digital terrain model with a mean facet size of 88 cm.
- Images were photometrically normalized to 0° phase angle using a ROLO phase function.
This download is an 8bit version of the original mosaic. The mapping used to convert to 8bit was a linear stretch from 0.002 - 0.007 to 1 - 254, maintaining 0 as NoDATA. The original 32bit version is also available for download from:
- Bennu_global_ShapeV20_GndControl_ROLOphase_ALBEDO_v6 - Albedo mosaic in 32bit floating point.
References:
Barnouin, O. S., Daly, M. G., Palmer, E. E., Johnson, C. L., Gaskell, R. W., Al Asad, M., et al., (2020). Digital terrain mapping by the OSIRIS-REx mission. Planetary and Space Science, 180(October 2018), 104764. https://doi.org/10.1016/j.pss.2019.104764
Bennett, C. A., DellaGiustina, D. N., Becker, K. J., Becker, T. L., Edmundson, K. L., Golish, D. R., et al., (2021). A high-resolution global basemap of (101955) Bennu. Icarus, 357(October 2019), 113690. https://doi.org/10.1016/j.icarus.2020.113690
Daly, M. G., Barnouin, O. S., Dickinson, C., Seabrook, J., Johnson, C. L., Cunningham, G., et al., (2017). The OSIRIS-REx Laser Altimeter (OLA) Investigation and Instrument. Space Science Reviews, 212(1–2), 899–924. https://doi.org/10.1007/s11214-017-0375-3
Daly, M. G., Barnouin, O. S., Seabrook, J. A., Roberts, J., Dickinson, C., Walsh, K. J., et al., (2020). Hemispherical differences in the shape and topography of asteroid (101955) Bennu. Science Advances, 6(41), eabd3649. https://doi.org/10.1126/sciadv.abd3649
Edmundson, K. L., Becker, K. J., Becker, T. L., Bennett, C. A., Dellagiustina, D. N., Golish, D. R., et al., (2020). PHOTOGRAMMETRIC PROCESSING of OSIRIS-REX IMAGES of ASTEROID (101955) BENNU. ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 5(3), 587–594. https://doi.org/10.5194/isprs-Annals-V-3-2020-587-2020
Golish, D. R., DellaGiustina, D. N., Li, J.-Y., Clark, B. E., Zou, X.-D., Smith, P. H., et al., (2021). Disk-resolved photometric modeling and properties of asteroid (101955) Bennu. Icarus, 357, 113724. https://doi.org/10.1016/j.icarus.2020.113724
Golish, D. R., Shultz, N. K., Becker, T. L., Becker, K. J., Edmundson, K. L., DellaGiustina, D. N., et al., (2021). A high-resolution normal albedo map of asteroid (101955) Bennu. Icarus, 355, 114133. https://doi.org/10.1016/j.icarus.2020.114133
Lauretta, D. S., Enos, H., Polit, A. T., Roper, H. L., & Wolner, C. W. V. (2021). OSIRIS-REx at Bennu: Overcoming challenges to collect a sample of the early Solar System. In A. Longobardo (Ed.), Sample Return Missions (pp. 163–194). Amsterdam, Netherlands: Elsevier.
- Publisher
- Planetary Data System
- Publication Date
- 26 June 2021
- Author
- Lunar and Planetary Laboratory, University of Arizona
- Originator
- Golish, D. R., Shultz, N. K., Becker, T. L., Becker, K. J., Edmundson, K. L., DellaGiustina, D. N., et al.
- Group
- PDS
- Added to Astropedia
- 26 June 2021
- Modified
- 27 June 2021
General
- Purpose
construction a near-global albedo map of Bennu with a ground sample distance of 6.25 cm/pixel (Golish et al. 2021a)
- Geospatial Data Presentation Form
- Global Mosaic
- Series Id
- 6
- Online Linkage
- https://planetarymaps.usgs.gov/mosaic/Bennu/Bennu_global_ShapeV20_GndControl_ROLOphase_ALBEDO_8bit_v6.tif
- Native Data Set Environment
- ISIS v3, GDAL
- Color
- Black and White
- Supplemental Information
- https://doi.org/10.1016/j.icarus.2020.114133, https://sbn.psi.edu/pds/resource/orex/ocams.html, https://www.asteroidmission.org/
Keywords
- System
- Small Bodies
- Target
- Bennu
- Theme
- Asteroids, Cartography, Image Processing, Photogrammetry, Remote Sensing, Sampling and analysis
- Mission
- OSIRIS-REx
- Instrument
- OCAMS
- Search Terms
- Asteroid, Asteroid surfaces, Image Processing, OSIRIS-REx, Bennu, mosaic, global
Contact and Distribution
- Access Constraints
- please cite authors
- Use Constraints
- public domain
Data Status and Quality
- Time Period of Content Begin
- 7 March 2019
- Time Period of Content End
- 7 March 2019
- Currentness Reference
- Ground condition
- Progress
- Complete
- Update Frequency
- As needed
- Completeness Report
See: Golish, D. R., Shultz, N. K., Becker, T. L., Becker, K. J., Edmundson, K. L., DellaGiustina, D. N., et al. (2021). A high-resolution normal albedo map of asteroid (101955) Bennu. Icarus, 355, 114133. https://doi.org/10.1016/j.icarus.2020.114133
- Process Description
The mapping used to convert to 8bit was a linear stretch from 0.002 - 0.007 to 1 - 254, maintaining 0 as NoDATA. See: Golish, D. R., Shultz, N. K., Becker, T. L., Becker, K. J., Edmundson, K. L., DellaGiustina, D. N., et al. (2021). A high-resolution normal albedo map of asteroid (101955) Bennu. Icarus, 355, 114133. https://doi.org/10.1016/j.icarus.2020.114133
- Horizontal Positional Accuracy Value
- 0.3
- Horizontal Positional Accuracy Report
- Accurate to Control Net
Lineage
- PDS Status
- PDS 3 Compatible
- Source Originator
- PDS
- Source Title
- OSIRIS-REx PDS archive
- Source Online Linkage
- https://sbn.psi.edu/pds/resource/orex/
- Type of Source Media
- Online
- Attribute Accuracy Report
- Best Effort
Geospatial Information
- Minimum Latitude
- -90
- Maximum Latitude
- 90
- Minimum Longitude
- 0
- Maximum Longitude
- 360
- Direct Spatial Reference Method
- Raster
- Object Type
- Pixel
- Lines (pixels)
- 12568
- Samples (pixels)
- 25134
- Bit Type
- 8
- Radius A
- 250
- Radius C
- 250
- Control Net
- OLA v20
- Bands
- 1
- Pixel Resolution (meters/pixel)
- 0.0625
- Scale (pixels/degree)
- 69.81388
- Horizontal Coordinate System Units
- Meters
- Map Projection Name
- Equirectangular
- Latitude Type
- Planetocentric
- Longitude Direction
- Positive East
- Longitude Domain
- 0 to 360