DLR Institute of Planetary Research - 10.01.2012 - Topography and albedo image of Urbinia crater

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10.01.2012 - Topography and albedo image of Urbinia crater

These Dawn FC (framing camera) images show Urbinia crater, after which Urbinia quadrangle is named. 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 in the top of the image are the highest areas and the blue areas in the bottom of the image are the lowest areas. Urbinia crater is distinctive because is has an irregularly shaped rim due to the formation of other impact craters along its rim and then subsequent erosion. There are at least 4 smaller impact craters on the rim of Urbinia crater that have changed the shape of the rim. But, the lower halves of these craters have partially slumped into the center of Urbinia crater, which means there is not a distinctive topographic difference between them and the walls of Urbinia crater. This is seen in the topography image because the color-coded heights are not too disrupted by the smaller impacts.

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