DLR Institute of Planetary Research - 12.12.2011 - Topography and albedo image of Numisia crater

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12.12.2011 - Topography and albedo image of Numisia crater

These Dawn FC (framing camera) images show the ~20km diameter Numisia crater, after which Numisia 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 area at the top of the image is the highest area and the blue area in the center of Numisia crater is the lowest area. The color-coded height image shows that Numisia crater impacted a relatively high (colored red) area and that Numisia crater is reasonably deep with steep sides. A smaller, more degraded impact crater, underneath Numisia crater to the right, is more clearly visible in the color-coded height image than in the albedo image. In the albedo image both dark and bright material is seen cropping out of and slumping down into Numisia crater.

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