(formerly Gilbert M)
Lat: 1.9°S, Long: 78.3°E, Diam: 34 km, Depth: 2.9 km, Rükl: 49
Depth data from Kurt Fisher database
- Westfall, 2000: 3.03 km
LRO altimetry 2.6 km deep, 34 km in diameter, with 375 m high central peak. (CAW)
John Monroe; American astronomer, mathematician (1833-1912).
- This replacement name for a formerly lettered crater was provisionally introduced on LTO-81A2. It was approved in 1976 (IAU Transactions XVIB). - JimMosher
- Printed as Van Vlek' on the revised and reprinted edition of the National Geographic Societys moonmap THE EARTH'S MOON (2014).
The Van Vleck Observatory (named after John M. Van Vleck) is mentioned on page 766 of Burnham's Celestial Handbook (Volume 2). See: Trigonometric Parallax for the star Chi Cygni. - DannyCaes May 4, 2015