Craters Cysatus Origin of the name Cysat, Jean-Baptiste; Swiss mathematician, astronomer (1588-1657). When to observe it … Nearby Gruemberger 54 km Curtius 132 km Moretus 134 km Rutherfurd 173 km Blancanus 209 km Zach 223 km Pentland 228 km Klaproth 250 km