<p>Apollo 15 Hasselblad image from film magazine 93/P - lunar orbit view.
This is figure 3-36 of the <i>Apollo 15 Preliminary Science Report</i> (NASA SP-289, 1972), which has the following caption:<br></p>
Eastern floor of Humboldt Crater. The mare-type material on the floor contains radial cracks and concentric rilles. A dark-halo area is visible at the lower left corner. Low hills of material that resemble the central peak protrude through the smooth crater floor. Bright-halo craters are also evident. The "doughnut" filling of the crater at the left margin is a rare feature.
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2015-10-03 21:04
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