PIA15549: An Old Crater Almost Completely Filled with Regolith

An Old Crater Almost Completely Filled with Regolith


This Dawn framing camera (FC) image of Vesta shows an old, very degraded crater that is almost completely filled with regolith. Regolith is the fine-grained material that covers most of Vesta's surface. Parts of the rim of the old crater are barely visible in this image as curving ridges. There have been many subsequent impact craters formed in the crater-filling regolith and there are also many grooves cutting across it. These grooves run diagonally across the image and are most visible in the bottom right of the image.

This image is located in Vesta's Oppia quadrangle, near the equator. NASA's Dawn spacecraft obtained this image with its framing camera on Jan. 1, 2012. This image was taken through the camera's clear filter. The distance to the surface of Vesta is 272 kilometers (169 miles) and the image has a resolution of about 25 meters (82 feet) per pixel. This image was acquired during the LAMO (low-altitude mapping orbit) phase of the mission.

Background Info:

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 D.C. UCLA is responsible for overall Dawn mission science. The Dawn framing cameras have been developed and built under the leadership of the Max Planck Institute for Solar System Research, Katlenburg-Lindau, Germany, with significant contributions by DLR German Aerospace Center, Institute of Planetary Research, Berlin, and in coordination with the Institute of Computer and Communication Network Engineering, Braunschweig. The Framing Camera project is funded by the Max Planck Society, DLR, and NASA/JPL.

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

Cataloging Keywords:

Name Value Additional Values
Target 4 Vesta
System Main Belt
Target Type Asteroid
Mission Dawn
Instrument Host Dawn
Host Type Orbiter
Instrument Framing Camera (FC)
Extra Keywords Crater, Grayscale, Impact
Acquisition Date
Release Date 2012-04-09
Date in Caption 2012-01-01
Image Credit NASA/JPL-Caltech/UCLA/MPS/DLR/IDA
Source photojournal.jpl.nasa.gov/catalog/PIA15549
Identifier PIA15549