Collection:
NASA Planetary Photo Journal Collection Collection NASA Planetary Photo Journal Collection Collection
Title:
Color Across Rhea Title Color Across Rhea Title
Original Caption Released with Image:
Side-by-side natural color and false-color views highlight the wispy terrain on Rhea's trailing hemisphere. The extreme false color image makes it clear that the wisps -- likely networks of fractures as on Dione -- cut across older, cratered terrain. In addition, a set of thin, north-south trending lineaments (also likely fractures) is visible on the left side of both views. The natural color view was created by compositing images taken using red, green and blue spectral filters. To create the false-color view, ultraviolet, green and infrared images were combined into a single picture that isolates and maps regional color differences. This "color map" was then superimposed over a clear-filter image that preserves the relative brightness across the body. The combination of color map and brightness image shows how colors vary across the surface of Rhea. The origin of the color differences is not yet understood, but may be caused by subtle differences in the surface composition or the sizes of grains making up the icy surface material. North on Rhea (1,528 kilometers, or 949 miles across) is up. The images were taken with the Cassini spacecraft narrow-angle camera on Jan. 17, 2007 at a distance of approximately 597,000 kilometers (371,000 miles) from Rhea. Image scale is 4 kilometers (2 miles) per pixel. The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo. For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov/home/index.cfm. The Cassini imaging team homepage is at http://ciclops.org. Original_Caption_Rel eased_with_Image Side-by-side natural color and false-color views highlight the wispy terrain on Rhea's trailing hemisphere. The extreme false color image makes it clear that the wisps -- likely networks of fractures as on Dione -- cut across older, cratered terrain. In addition, a set of thin, north-south trending lineaments (also likely fractures) is visible on the left side of both views. The natural color view was created by compositing images taken using red, green and blue spectral filters. To create the false-color view, ultraviolet, green and infrared images were combined into a single picture that isolates and maps regional color differences. This "color map" was then superimposed over a clear-filter image that preserves the relative brightness across the body. The combination of color map and brightness image shows how colors vary across the surface of Rhea. The origin of the color differences is not yet understood, but may be caused by subtle differences in the surface composition or the sizes of grains making up the icy surface material. North on Rhea (1,528 kilometers, or 949 miles across) is up. The images were taken with the Cassini spacecraft narrow-angle camera on Jan. 17, 2007 at a distance of approximately 597,000 kilometers (371,000 miles) from Rhea. Image scale is 4 kilometers (2 miles) per pixel. The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo. For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov/home/index.cfm. The Cassini imaging team homepage is at http://ciclops.org. Original Caption Released with Image
Image Credit:
NASA/JPL/Space Science Institute Image_Credit NASA/JPL/Space Science Institute Image Credit
Produced By:
Cassini Imaging Team Produced_By Cassini Imaging Team Produced By
Mission:
Cassini Mission Cassini Mission
Spacecraft:
Cassini Orbiter Spacecraft Cassini Orbiter Spacecraft
Target Name:
Rhea Target_Name Rhea Target Name
Is a satellite of:
Saturn Is_a_satellite_of Saturn Is a satellite of
Instrument:
Imaging Science Subsystem - Narrow Angle Instrument Imaging Science Subsystem - Narrow Angle Instrument
Product Size:
1312 samples x 628 lines Product_Size 1312 samples x 628 lines Product Size
Primary Data Set:
Cassini Primary_Data_Set Cassini Primary Data Set
facet_what:
Rhea facet_what Rhea facet_what
facet_what:
Dione facet_what Dione facet_what
facet_what:
Saturn facet_what Saturn facet_what
facet_what:
Cassini facet_what Cassini facet_what
facet_what:
Cassini Orbiter facet_what Cassini Orbiter facet_what
facet_what:
Huygens Probe facet_what Huygens Probe facet_what
facet_what:
Cassini-Huygens facet_what Cassini-Huygens facet_what
facet_what:
Imaging Science Subsystem (ISS) facet_what Imaging Science Subsystem (ISS) facet_what
facet_what:
Rhea (Saturn Moon) facet_what Rhea (Saturn Moon) facet_what
facet_where:
Jet Propulsion Laboratory facet_where Jet Propulsion Laboratory facet_where
facet_where:
Rhea facet_where Rhea facet_where
facet_where:
Dione facet_where Dione facet_where
facet_where:
Saturn facet_where Saturn facet_where
facet_where:
California facet_where California facet_where
facet_where:
Washington facet_where Washington facet_where
facet_where:
Jet Propulsion Laboratory (JPL) facet_where Jet Propulsion Laboratory (JPL) facet_where
facet_where:
Washington, D.C. facet_where Washington, D.C. facet_where
Image #:
PIA08871 Image_# PIA08871 Image #
UID:
SPD-PHOTJ-PIA08871 UID SPD-PHOTJ-PIA08871 UID
orignial url:
http://photojournal… orignial_url http://photojournal… orignial url

Color Across Rhea

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Color Across Rhea