PIA09356: Ganymede in Visible and Infrared Light


Ganymede in Visible and Infrared Light

Caption:

This montage compares New Horizons' best views of Ganymede, Jupiter's largest moon, gathered with the spacecraft's Long Range Reconnaissance Imager (LORRI) and its infrared spectrometer, the Linear Etalon Imaging Spectral Array (LEISA).

LEISA observes its targets in more than 200 separate wavelengths of infrared light, allowing detailed analysis of their surface composition. The LEISA image shown here combines just three of these wavelengths -- 1.3, 1.8 and 2.0 micrometers -- to highlight differences in composition across Ganymede's surface. Blue colors represent relatively clean water ice, while brown colors show regions contaminated by dark material.

The right panel combines the high-resolution grayscale LORRI image with the color-coded compositional information from the LEISA image, producing a picture that combines the best of both data sets.

The LEISA and LORRI images were taken at 9:48 and 10:01 Universal Time, respectively, on February 27, 2007, from a range of 3.5 million kilometers (2.2 million miles). The longitude of the disk center is 38 degrees west. With a diameter of 5,268 kilometers (3,273 miles), Ganymede is the largest satellite in the solar system.

Cataloging Keywords:

Name Value Additional Values
Target Ganymede Jupiter
System Jupiter
Target Type Satellite Planet
Mission New Horizons
Instrument Host New Horizons
Host Type Flyby Spacecraft
Instrument Linear Etalon Imaging Spectral Array (LEISA) Long Range Reconnaissance Imager (LORRI)
Detector
Extra Keywords Color, Infrared, Visual, Water
Acquisition Date
Release Date 2007-05-01
Date in Caption 2007-02-27
Image Credit NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
Source photojournal.jpl.nasa.gov/catalog/PIA09356
Identifier PIA09356