Apollo 16 Hasselblad image from film magazine 119/RR - Lunar orbit.  The bright rayed crater is Lassel D, and just beyond it is Lassel J.<br>This photo is used in Figure 4-40 of the <i>Apollo 16 Preliminary Science Report</i> (NASA SP-315), which has the following caption:<br>Typical mare terrain illuminated by a high Sun. The smooth surface of the Sea of Clouds approximately 20 km west of the Crater Lassell C is pocked by craters as large as 6 km in diameter. A conspicuous 3-km-diameter crater and scattered craters less than 200 m across exhibit bright halos when illuminated by a Sun 35° to 40° above the eastern horizon. The craters without halos appear almost as sharp as the bright-halo craters. Sun-facing crater walls commonly are brighter than adjacent rim deposits. Most craters have low, narrow rims that merge imperceptibly with the adjacent mare materials. An anomalously dark 3-km-diameter crater in the lower right quarter of the frame has no detectable halo, either light or dark. The Sun-facing wall is approximately as dark as the adjacent mare materials; the rim does not merge with the surrounding mare because of a sharp change in slope along its outer margin.
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1972
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