File:AS08-13-2345 crop.jpg

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Summary

Description
English: Apollo 8 Hasselblad image from film magazine 13/E - Lunar Orbit, Trans-Earth Coast.

This photo was used in Figure 2-13 of the Analysis of Apollo 8 Photography and Visual Observations (SP-201), which has the following caption:

The crater Maskelyne F and the area north of landing site 1 (Apollo 8 frame 2345-E).

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

Mare Fecunditatis, the Secchi peninsula (target of opportunity (T/O) 78a), and Mare Tranquillitatis were photographed most often by forward-looking obliques. A large block of photographs of this area is on magazine E. One sequence (frames 2339 to 2345) —in addition to some rather dark, poorly detailed pictures of Messier and Messier A (T/O 75), Mare Fecunditatis, and the Secchi peninsula— includes two excellent, well-exposed, and well-illuminated scenes in Mare Tranquillitatis taken with the 250-mm lens. One of these (fig. 2- 12), which includes the Cauchy rilles and Cauchy domes (T/O 87, frame 2344), shows the area better than does any Lunar Orbiter photograph and is useful in spite of the extreme obliquity and low resolution. The same description applies to the other frame (2345, fig. 2-13) in the vicinity of landing site 1 where, unfortunately, the window cuts off the landing site 1 from view. The so-called training sequence (frames 2271 to 2309) is an improvement over Lunar Orbiter IV photography in approximately the first two frames, where the near scene is within the poor Lunar Orbiter IV frame H-61. The next frames, however, within the area covered by Lunar Orbiter I frame M-41 and Lunar Orbiter IV frames H-66 and H-73, are not particularly useful. The western, near-terminator pictures in the vicinity of landing site 1 are underexposed and are north of landing site 1 proper. The only good frames in this sequence are frames 2300 to 2309 (fig. 2-14), which were taken when the camera was pointed back. The film sensitivity had also improved greatly, possibly through prefogging. Crater densities, fine textures in several geologic units (including one probably like that in landing site 1, unit tm in fig. 2-14), and relations among mare ridges (showing overlap of a subdued ridge by a sharp one) are all brought out in the low-Sun illumination (fig. 2-14).
Date
Source AS08-13-2345
Author NASA
This image or video was catalogued by one of the centers of the United States National Aeronautics and Space Administration (NASA) under Photo ID: AS08-13-2345.

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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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Mare Tranquillitatis

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current22:56, 19 October 2023Thumbnail for version as of 22:56, 19 October 20233,680 × 2,060 (655 KB)JstubyUploaded a work by NASA from [https://www.flickr.com/photos/projectapolloarchive/21764831658/ AS08-13-2345] with UploadWizard
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