PIA11219: Exploring Mercury's Surface with MESSENGER's Color Images


Exploring Mercury’s Surface with MESSENGER’s Color Images

Caption:

These two images, published in the July 4 issue of Science magazine, illustrate the power of using MESSENGER's WAC multi-spectral images to study compositional variations across the surface of Mercury. Both images shown here were generated using a statistical method known as principal component analysis. In this analysis, images taken through the WAC's 11 different narrow-band color filters are compared and contrasted to discover significant variations. The image on the left shows Mercury in one of the resulting principal components that enhances the largest color differences on Mercury's surface. The Caloris basin (labeled with a C) is shown to be considerably different from the surrounding areas in this view. Dark craters within Caloris (shown with white arrows), such as Atget crater , are clearly distinct. Mozart crater (labeled with an M) and the Tolstoj basin and material ejected from it (basin labeled with Tsp; ejecta labeled with a T) also show significant color signatures . The image on the right was created by displaying the negative of the left image in red, a different principal component in green, and a ratio of images taken in two WAC filters (430 nm/560 nm) in blue. The white arrows identify areas of Mercury's surface that are interpreted to be relatively young volcanic plains, and the black arrows point to reddish areas interpreted to be volcanoes . Most of the color differences studied here are believed to indicate variations in the mineral composition and physical state of the rocks at different places on Mercury.

Date Acquired: January 14, 2008
Image Mission Elapsed Time (MET): 108829678 - 108829728
Instrument: Wide Angle Camera (WAC) of the Mercury Dual Imaging System (MDIS)
Scale: Mercury's diameter is 4880 kilometers (3030 miles)

Background Info:

These images are from MESSENGER, a NASA Discovery mission to conduct the first orbital study of the innermost planet, Mercury. For information regarding the use of images, see the MESSENGER image use policy .

Cataloging Keywords:

Name Value Additional Values
Target Mercury
System
Target Type Planet
Mission MESSENGER
Instrument Host MESSENGER
Host Type Orbiter
Instrument Mercury Dual Imaging System (MDIS)
Detector Wide Angle Camera (WAC)
Extra Keywords Color, Crater, Volcano
Acquisition Date
Release Date 2008-09-16
Date in Caption 2008-01-14
Image Credit NASA/Johns Hopkins University Applied Physics Laboratory/Arizona State University/Carnegie Institution of Washington. Image reproduced courtesy of Science/AAAS.
Source photojournal.jpl.nasa.gov/catalog/PIA11219
Identifier PIA11219