Lat: 25.4°S, Long: 2.5°E, Diam: 61 km, Depth: 1.16 km, Rükl: 55, pre-Nectarian
(IAU Directions) BLANCHINUS.--A large walled-plain on the E. of Purbach and abutting on the S. side of LACAILLE. It much resembles Purbach in shape, but has lower walls. Schmidt shows a crater on the N. side of the floor, which I have seen, and a number of parallel ridges which have not been noted, probably because they are only visible under very oblique light.
Depth data from Kurt Fisher database
- Pike, 1976: 1.16 km
- Westfall, 2000: 1.16 km
- Cherrington, 1969: 1.58 km
The rim of Blanchinus is part of the Lunar X (which is a well-known telescopic clair-obscur phenomenon for observers of the First Quarter Moon).
- Giovanni Bianchini (Johannes Blanchinus) (1410 – c. 1469) was an Italian astronomer and a professor of astronomy at the University of Ferrara. He was an associate of Georg Purbach and Regiomontanus. He should not be confused with Francesco Bianchini (1662-1729) (after whom Bianchini crater is named) or Giuseppe Biancani (1566-1624) (after whom Blancanus crater is named).
- Erroneously printed as "Blanchinius" (an "i" too much) instead of Blanchinus on page 39 (chart 13) of Chuck Wood's and Maurice Collins's 21st Century Atlas of the Moon.- DannyCaes Jan 21, 2013