|Lat: 22.5°N, Long: 102.2°W, Diam: 62 km, Depth: km, Rükl: (farside)|
Middle: Lunar Orbiter view from Map-A-Planet.
Right: Color-coded topography LAC 54 from USGS Digital Atlas.
LPOD Photo Gallery Lunar Orbiter Images
The eastern sunlit inner slopes of Helberg (at the local evening terminator) were captured on Lunar Orbiter V photographs 5013-h2, 5014-h2, 5015-h2, 5016-h2, 5017-h2, 5018-h2, 5019-h2, and 5020-h2.
Research Danny Caes
The east-northeastern one of the two distinct rays from nearby crater Ohm runs over Helberg and Robertson immediately west-southwest of it (see Clementine photograph above). - DannyCaes Aug 15, 2015
Robert J.; American aeronautical engineer (1906-1967).
Rimae Helberg (a certain amateur selenologist's unofficial name for the rilles on the floor of Helberg).
Excerpt from the //USGS Digital Atlas of the Moon.