Kepler (lunar crater)

lunar crater data


caption=The lunar crater Kepler from Apollo 12. "NASA photo."
latitude=8.1
N_or_S=N
longitude=38.0
E_or_W=W
diameter=32 km
depth=2.6 km
colong=38
eponym=Johannes Kepler

Kepler is a young lunar impact crater that lies between the Oceanus Procellarum to the west and Mare Insularum in the east. To the southeast is the crater Encke.

Kepler is most notable for the prominent ray system that covers the surrounding "maria". The rays extend for well over 300 kilometers, overlapping the rays from other craters. Kepler has a small of "ejecta" surrounding the exterior of its high rim. The outer wall is not quite circular, and possesses a slightly polygonal form. The interior walls of Kepler are slumped and slightly d, descending to an uneven floor and a minor central rise.

One of the rays from Tycho, when extended across the Oceanus Procellarum, intersects this crater. This was a factor in the choice of the crater's name when Giovanni Riccioli was creating his system of lunar nomenclature, as Kepler used the observations of Tycho Brahe while devising his three laws of planetary motion. On Riccioli's maps, this crater was named "Keplerus", and the surrounding skirt of higher albedo terrain was named "Insulara Ventorum".

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 Kepler.

References

* cite web
last = Wood | first = Chuck | date = 2006-07-05
url = http://www.lpod.org/?m=20060705
title = A Smarter Kepler
publisher = Lunar Photo of the Day
accessdate = 2006-07-12