The floor of the lunar crater Lehmann and the extreme northern dark floor of Schickard based on Orbiter IV HR160/2 microfilm

Details The floor of the lunar crater Lehmann and the extreme northern dark floor of Schickard based on Orbiter IV HR160/2 microfilm The floor of the lunar crater Lehmann and the extreme northern dark floor of Schickard based on Orbiter IV HR160/2 microfilm

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jbaa..100..228a&link_type=abstract

Journal of the British Astronomical Association, vol.100, no.5, p.228-230

Astronomy and Astrophysics

Astronomy

Lunar Topography

Scientific paper

A simple technique has been developed, using low power microscopy and photomicrography, applied to suitable Orbiter microfilm frames, with the permission of the National Space Science Data Centre, to obtain detailed accurate drawings and charts of some selected lunar features. The aim of these studies is to assess the possibility, and the probable mechanisms, of endogenic processes, which may have modified some lunar structures within the highland regions of the Moon. Attention is being directed towards the distribution and the fine structure of features in the walls and on the floors of the selected formations, and towards an attempt to classify these as endogenic or exogenic. The very large crater Schickard is an obvious example for examination, because of the wide extent of its floor and walls, as well as the variety of its interior features. However the limited illumination conditions shown by the Orbiter IV pictures calls for further observational data, especially at sunset and also under high angle illumination. An example of a detailed drawing from a small part of the Schickard Orbiter IV High Resolution 160/2 microfilm is shown and discussed. The existence of a sinuous rille, linking the floor of Lehmann to the dark northern floor of Schickard, is of very special interest in view of a recent paper by Coombs, Hawke and Wilson, which is concerned with the thermal erosion of lava channels.

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