De Morgan
Contents
De Morgan
Lat: 3.3°N, Long: 14.9°E, Diam: 10 km, Depth: 1.9 km, [/R%C3%BCkl%2034 Rükl: 34]
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Table of Contents
Images
LPOD Photo Gallery Lunar Orbiter Images Apollo Images
- Although there's nothing in the LPI's search list for orbital Apollo photographs of De Morgan and nearby craters [/Cayley Cayley], [/D%27Arrest D'Arrest], and [/Whewell Whewell], these craters were captured on several frames of Apollo 16's north-looking metric/mapping Fairchild camera, such as frame AS16-M-0831. In this frame, De Morgan and its surrounding craters are visible near the central part of the curved horizon.
- Research: Danny Caes.
Maps
([/LAC%20zone LAC zone] 60D4) LAC map Geologic map LM map AIC map
Description
[/Clementine Clementine] provides an excellent view of this standard little simple crater. It has steep walls and a flat floor with two tiny hills as central peaks. de Morgan's walls are not nearly as bright as those of nearby [/Cayley Cayley], suggesting that the smaller crater is older. This is supported by noting that [/Cayley Cayley] truncates one of the dark rays from [/Dionysius Dionysius], whereas a piece of the dark ejecta seems to impinge on the western wall of de Morgan. But two other dark areas occur along the northern wall so perhaps this is just a buried pyroclastic layer - the same one that is the source of [/Dionysius Dionysius]' rays. - tychocrater tychocrater Sep 26, 2007
Elger
([/IAU%20Directions IAU Directions]) DE MORGAN.--A brilliant little crater, 4 miles in diameter, on the plain S. of the [/Ariadaeus Ariadaeus] cleft.
Wikipedia
Additional Information
- IAU page: De Morgan
- Depth data from [/Kurt%20Fisher%20crater%20depths Kurt Fisher database]
- Viscardy, 1985: 1.9 km
Nomenclature
- Named for Augustus de Morgan (June 27, 1806 – March 18, 1871), an Indian-born British mathematician and logician. He formulated De Morgan's laws and was the first to introduce the term, and make rigorous the idea of mathematical induction.
LPOD Articles
Bibliography
Harold Hill. [/A%20Portfolio%20of%20Lunar%20Drawings A Portfolio of Lunar Drawings], page 5 (the [/Rima%20Ariadaeus Ariadaeus rille]).
Augustus de Morgan in the Sourcebook Project (William R. Corliss)
- Page 127 in Mysterious Universe, a handbook of astronomical anomalies (1979) :
- The Maedler Phenomenon (Richard Baum, Strolling Astronomer, 1978).
[/Alphabetical%20Index Named Features] -- Prev: [/De%20Moraes De Moraes] -- Next: [/De%20Roy De Roy]
This page has been edited 1 times. The last modification was made by - tychocrater tychocrater on Jun 13, 2009 3:24 pm - afx3u3
