Sihtu Planitia is a large plain on Mercury, approximately 565 km across. It was named in 2017 by the IAU.Sihtu Planitia, Gazetteer of Planetary Nomenclature, International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN) The plain was first imaged by Mariner 10 in 1974.
The crater Calvino lies at the center of the Planitia, and Rūdaki is on the east side.
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