Rotation rate measurement across latitude of 105 sunspots between September 2013 and January 2024. Colors and symbols represent the grade of the sunspot (see Fig. 2). The measurements were fit according to Eq. (2) by two rotation laws with two (red) or three (purple) parameters, respectively, and compared to other studies of all sunspot types (dotted) by Balthasar et al. (1986) and quiet Sun rotation via Doppler-measurements (dashed) by Snodgrass (1984).