stellarsolver Astrometric Plate Solver stellarsolver is a cross platform SEP-based star extractor and astrometry.net-based internal astrometric solver. Also refered to as Plate solving or Astrometric calibration of an astronomical image, this is a technique used in astronomy and applied on celestial images. the astrometric solution it is possible to calculate the celestial coordinates of any object on the image or synchronize the telescope mount or satellite pointing position to the center of the image taken. stellarsolver is required to compile Kstars with INDI support.