Woltjer is an
impact crater that is located in the northern
latitudes of the
Moon's
far side. It is just attached to the southern outer rim of the larger crater
Montgolfier. To the southwest is
Schneller and to the east is
Stoletov. It is named after astronomer
Jan Woltjer.
This is a relatively recent impact compared to most of the craters on the far side, and the rim is still well-formed with little erosion. It is old enough, however, that its
albedo matches its surroundings and it lacks a
ray system
A ray system comprises radial streaks of fine '' ejecta'' thrown out during the formation of an impact crater, looking somewhat like many thin spokes coming from the hub of a wheel. The rays may extend for lengths up to several times the diameter ...
. The inner wall has slumped in places and formed piles of
talus along the south. The interior floor has two lines of low ridges that begin in the southeast and curve up to the northwestern inner wall. There is a level patch in the southern floor near the inner wall.
Satellite craters
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Woltjer.
References
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External links
{{commons category-inline, Woltjer (lunar crater)
Lunar Orbiter Photo Number V-039-H3
Impact craters on the Moon