Astronomy:Hartwig (Martian crater)
Viking 1 image with Hartwig at bottom
Hartwig is an impact crater in the Argyre quadrangle of Mars, located at 39° south latitude and 16° west longitude. It is 105 km in diameter and was named after Ernst Hartwig, a German astronomer (1851–1923).
Hartwig is located southwest of Vogel crater.
West side of Hartwig crater, as seen by CTX camera (on Mars Reconnaissance Orbiter).
Original source: https://en.wikipedia.org/wiki/ Hartwig (Martian crater). Read more