File:Ina hrp219a.jpg

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Summary

Description
English: The unique lunar feature Ina (center), within Lacus Felicitatis, on the moon. The feature was often called the 'D-Caldera' prior to formal naming in 1979. This is Figure 232 of Apollo Over the Moon (NASA SP-362, 1978), which has the following caption:
The steep-walled but shallow D-shaped depression near the center of the photograph is apparently a unique feature. It is located in a patch of mare on the foothills of the Montes Haemus, west of Mare Serenitatis. Measured along its straight side, the depression is about 3 km wide. It is situated atop a very gentle circular dome that appears to be somewhat smoother than the surrounding mare surface. As is more clearly shown in the accompanying stereogram (fig. 233), the many bulbous structures on the floor give it a blisterlike appearance.
The depression is believed to be volcanic, probably a caldera (El-Baz, 1973b). Figure 234 explains the probable sequence of events leading to the formation of this unusual structure.-F.E.-B.
Date original 1972, published 1978
Source

Transferred from en.wikipedia to Commons. (Original text: Apollo 17 Metric camera image AS17-M-1672, cropped to show Ina and surrounding terrain.

Immediate source: NASA History Program Office, Apollo Over the Moon, A view from orbit (NASA SP-362, 1978)
Figure 228 hrp219
)
Author NASA

Licensing

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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Date/Time Dimensions User Comment
2014-04-02 04:18 700×724× (104920 bytes) Jstuby {{Information |Description = The unique lunar feature Ina (center), within [[Lacus Felicitatis]], on the moon. The feature was often called the 'D-Caldera' prior to [http://planetarynames.wr.usgs.gov/Feature/2680 formal naming in 1979]. This is Figur...

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Date/TimeThumbnailDimensionsUserComment
current00:29, 12 September 2016Thumbnail for version as of 00:29, 12 September 20162,320 × 2,316 (1.3 MB)Jstubyhigher resolution http://wms.lroc.asu.edu/apollo/view?camera=M&image_name=AS17-M-1672
01:58, 16 March 2016Thumbnail for version as of 01:58, 16 March 2016700 × 724 (102 KB)FastilyCloneTransferred from enwp
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