Naonobu (crater)

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Naonobu (crater)
Coordinates 4°36′S 57°48′E / 4.6°S 57.8°E / -4.6; 57.8Coordinates: 4°36′S 57°48′E / 4.6°S 57.8°E / -4.6; 57.8
Diameter 34 km
Depth Unknown
Colongitude 302° at sunrise
Eponym Naonobu Ajima

Naonobu is a small lunar impact crater named after Japanese mathematician Ajima Naonobu. It is located on the eastern Mare Fecunditatis, to the northwest of the prominent crater Langrenus, and it forms a triple-crater formation with the adjacent Atwood to the south and Bilharz just to the southwest. Naonobu and Atwood are separated by only a few kilometres.

The interior of this crater has been flooded with basaltic lava, leaving a relatively flat interior and a reduced outer rim. There is no central peak, but a tiny craterlet lies just to the southwest of the midpoint. A similar craterlet lies across the western interior of the rim.

This crater was previously designated Langrenus B before being renamed by the IAU.

References

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  • McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. Retrieved 2007-10-24. 
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