PDS logoPlanetary Data System
PDS Information
Find a Node - Use these links to navigate to any of the 8 publicly accessible PDS Nodes.

This bar indicates that you are within the PDS enterprise which includes 6 science discipline nodes and 2 support nodes which are overseen by the Project Management Office at NASA's Goddard Space Flight Center (GSFC). Each node is led by an expert in the subject discipline, supported by an advisory group of other practitioners of that discipline, and subject to selection and approval under a regular NASA Research Announcement.
Click here to return to the Photojournal Home Page Click here to view a list of Photojournal Image Galleries Photojournal_inner_header
Latest Images  |  Spacecraft & Technology  |  Animations  |  Space Images App  |  Feedback  |  Photojournal Search  

PIA15600: Tarpeia Crater, Close, Closer, Closest
 Target Name:  Vesta
 Is a satellite of:  Sol (our sun)
 Mission:  Dawn
 Spacecraft:  Dawn
 Instrument:  VIR
 Product Size:  1073 x 1322 pixels (w x h)
 Produced By:  JPL
 Full-Res TIFF:  PIA15600.tif (4.261 MB)
 Full-Res JPEG:  PIA15600.jpg (53.96 kB)

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

Original Caption Released with Image:

Click here for larger version of PIA15600
Annotated Version
Click on the image for larger view

These images of Tarpeia crater, near the south pole of the giant asteroid Vesta, were obtained by the visible and infrared mapping spectrometer on NASA's Dawn spacecraft. Colorized versions of the images show younger material with abundant pyroxene (an iron- and magnesium-rich material) and older layers with less pyroxene.

The visible and infrared mapping spectrometer obtained the images during Dawn's survey orbit (1,700 miles or 2,750 kilometers in altitude) on Aug. 21, 2011; high-altitude mapping orbit (420 miles or 680 kilometers above the surface) on Oct. 9, 2011; and low-altitude mapping orbit (130 miles or 210 kilometers in altitude) on Feb. 5, 2012.

In the colorized images, scientists assigned red to the 1.9-micron wavelength of reflected light, green to the 1.5-micron wavelength and blue to the 1.2-micron wavelength. In the resulting image, the brown and yellow materials have similar composition, but the brown material receives less illumination from sunlight and appears darker. The material on the edge of the crater rim that appears blue in these images suggests a different, fresher material. This material must have been exposed during a landslide or a similar recent event that occurred on the side of the crater. Researchers think the blue areas have been less altered over time, preserving more of the original material of Vesta.

The Dawn mission to Vesta and Ceres is managed by NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, for NASA's Science Mission Directorate, Washington. UCLA is responsible for overall Dawn mission science. The visible and infrared mapping spectrometer was provided by the Italian Space Agency and is managed by the Italy's National Institute for Astrophysics, Rome, in collaboration with Selex Galileo, where it was built.

More information about the Dawn mission is online at http://www.nasa.gov/dawn and http://dawn.jpl.nasa.gov.

Image Credit:
NASA/JPL-Caltech/UCLA/INAF

Image Addition Date:
2012-04-25