Väisälä (crater)

Väisälä is a tiny lunar impact crater located on a rise in the Oceanus Procellarum. Sharing the same continental island are the brilliant crater Aristarchus to the south-southeast and Herodotus to the south-southwest. Väisälä lies just to the west of the Rupes Toscanelli fault line, and the Rimae Aristarchus rille system. To the southwest is the notable Vallis Schröteri cleft.

Väisälä

Lunar crater Väisälä as seen by Lunar Orbiter 4 in 1967
Coordinates	25.9°N 47.8°W / 25.9; -47.8
Diameter	8 km
Depth	unknown
Colongitude	48° at sunrise
Eponym	Yrjö Väisälä

Oblique view from Apollo 15

This formation is circular and cup-shaped, with a higher albedo than the surrounding dark surface. It was previously designated Aristarchus A before being named after prolific Finnish astronomer Yrjö Väisälä by the IAU.

See also

• 1573 Väisälä , minor planet
• 2804 Yrjö, minor planet

References

• Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.CS1 maint: ref=harv (link)
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• Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.CS1 maint: ref=harv (link)