„The term for one rotation with respect to the ICRS is a “stellar day.” The IERS lists a stellar day as 86164.098903691 s, in comparison to sidereal day duration of 86164.09053083288 s and a conventional solar day (without leap seconds) of precisely 86,400 s.“ (David Crouse: An Overview of Major Terrestrial, Celestial, and Temporal Coordinate Systems for Target Tracking. Naval Research Laboratory, August 2016, S. 24).
