Walther (crater)

The rim of Walther is complex, heavily eroded and incised by lesser impacts. The wall retains a generally circular form, but many of its features have been worn away and there is a slight protruding bulge in the western rim. The floor has been resurfaced after the original impact, leaving the southwestern half relatively smooth. In the northwest quadrant is an offset central peak that has been worn and impacted by several small craters.

Walther is named after the German astronomer Bernhard Walther.{{gpn|6483}} Like many of the craters on the Moon's near side, it was named (in the Latin form, 'Valtherus') by Giovanni Riccioli, whose 1651 nomenclature system has become standardized.{{cite book | first = Ewen A. | last = Whitaker | authorlink = Ewen Whitaker | date = 1999 | title = Mapping and Naming the Moon | publisher = Cambridge University Press | isbn =978-0-521-62248-6 }}{{rp|215}} Earlier lunar cartographers had given the feature different names: Michael van Langren's 1645 map calls it "Caroli I Reg. Britt.", after King Charles I of England,{{rp|197}} and Johannes Hevelius grouped it with Purbach and Regiomontanus as "Mons Libanus" after Mount Lebanon.{{rp|205}}

File:Walther lunar crater map.jpg with the telescopes Meade LX200 14" and Lumenera Skynyx 2-1]]

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Walther.

File:Weinek Mond-Atlas T077.jpg

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{{Commons category}}

Category:Impact craters on the Moon