Terby is a crater on the northern edge of Hellas Planitia, Mars. It is in the Iapygia quadrangle. The 174-kilometre-diameter (108 mi) crater is centered at 28°S, 73°E with an elevation of −5 km (−3.1 mi). It is named after François J. Terby. It is the site of an ancient lakebed and has clay deposits.
Terby ( crater )