File:AS08-12-2125 (21446107633).jpg

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Apollo 8 Hasselblad image from film magazine 12/D - Lunar Orbit. This photo was used in Figure 2-45 (a) of the Analysis of Apollo 8 Photography and Visual Observations (SP-201), which has the following caption:

Equal phase angle contours from 1° to 10° for Apollo 8 frames 2124 and 2125. (a) Frame 2125, (b) frame 2124.

The text of the Analysis refers to the figure as follows:

A washout, or zero-phase region, can be seen in figure 2-45 (b). The overprinted ellipses are constant phase-angle contours and indicate that the washout, under the conditions of high-Sun and nearly vertical viewing, subtends about 3°. An obvious feature of figure 2-45(b) is the many small, bright craters. A result of importance for visibility is the somewhat contradictory situation in which these steep craters (which should be avoided by the LM) are best seen at high Sun angles, whereas relative terrain heights and slopes are best seen at low Sun angles.
Date
Source AS08-12-2125
Author Project Apollo Archive
This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: AS08-12-2125.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.
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Licensing[edit]

This image was originally posted to Flickr by Apollo Image Gallery at https://flickr.com/photos/136485307@N06/21446107633 (archive). It was reviewed on 6 January 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark.

6 January 2019

Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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current06:07, 6 January 2019Thumbnail for version as of 06:07, 6 January 20194,400 × 4,600 (719 KB)Tm (talk | contribs)Transferred from Flickr via #flickr2commons

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