These Dawn FC (framing camera) images show Oppia crater, after which Oppia quadrangle is named. Oppia crater is a distinctive crater because it has an unusually shaped rim, which is almost rectangular in form. The left image is an albedo image, which is taken directly through the clear filter of the FC. Such an image shows the albedo (eg. brightness/ darkness) of the surface. The right image uses the same albedo image as its base but then a color-coded height representation of the topography is overlain onto it. The topography is calculated from a set of images that were observed from different viewing directions, allowing stereo reconstruction. The various colors correspond to the height of the area. The white and red areas at the bottom of the image are the highest areas and the blue area in the center of Oppia crater and at the top of the image are the lowest areas. The landslide/slump features running into the center of Oppia crater are distinctive in both the albedo and topography images. There is an area above Oppia crater, which contains 2 small impact craters, that looks like a depression in the albedo image. But in the topography image it is clear that there is not much of a height difference between this area and the surrounding terrain.
These images are located in Vesta’s Oppia quadrangle and the center latitude and longitude of the image is 6.5°S, 307.8°E. NASA’s Dawn spacecraft obtained this image with its framing camera on October 11, 2011. This image was taken through the camera’s clear filter. The distance to the surface of Vesta is 700 km and the image has a resolution of about 70 meters per pixel. This image was acquired during the HAMO (High Altitude Mapping Orbit) phase of the mission. The images are lambert-azimuthal map projected.
Image Credit: NASA/ JPL-Caltech/ UCLA/ MPS/ DLR/ IDA
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