Astronomy:Secchi (Martian crater)
Topographic map of Secchi crater
Secchi is a crater in the Hellas quadrangle of Mars, located at 58.3° south latitude and 258.1° west longitude. it is 223 km in diameter and was named after Angelo Secchi, an Italian astronomer (1818–1878).
Viking Orbiter 1 mosaic
The limb of Mars with Secchi crater in center foreground, and part of the Hellas basin in far left distance
Original source: https://en.wikipedia.org/wiki/Secchi (Martian crater). Read more