Keeler (lunar crater)

Keeler (lunar crater)

Citation maintenance. Please you see. Any concerns? Please . lunar crater data
latitude=10.2
N_or_S=S
longitude=161.9
E_or_W=E
diameter=160 km
depth="Unknown"
colong=200
eponym=James E. Keeler

Keeler is a large lunar crater that lies on the Moon's far side. It is connected along the eastern edge to Heaviside, a walled-plain of similar dimensions. Keeler, however, is the younger of the two formations, with more clearly delineated features. To the northeast of Keeler is the smaller Stratton crater, and to the northwest lies Ventris crater.

The outer rim of Keeler is roughly circular, with a straight segment where it is joined to Heaviside. The northern portion of the rim is more irregular, with an outward protuberance to the north-northwest. Portions of the inner wall have a structure, especially along the southern half. Within the crater interior, Planté crater lies on the eastern floor, adjacent to the inner wall. There is an interior ridge that runs from about the mid-point toward the west-southwest. The floor is generally level, with some areas of irregularity to the south. A few small and tiny craterlets mark the interior plain.

Measurements with the electron reflectometer instrument on board the Lunar Prospector showed that this crater is one of a number of impact sites that show demagnetization. The low magnetic reading lies at the center of this crater, and the reduced field extends outward to about one and a half crater diameters. Scientists believe that shock demagnitization is the cause.

atellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater mid-point that is closest to Keeler crater.

References

* cite journal
author=J. S. Halekas "et al"
title=Demagnitization signatures of lunar impact craters
journal=Geophysical Research Letters
year=2002 | volume=29 | issue=13
doi=10.1029/2001GL013924
pages=1645

External links

* [http://www.lpi.usra.edu/resources/mapcatalog/LTO/lto85c1_1/ LTO-85C1 Plante] — L&PI topographic map of crater interior.


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