There is neither any LAW nor any FORMULA to calculate VELOCITY of Axial Rotation of Planets in present Astrophysics based on Kepler-Newton-Einstein’s theories. Here we have established THE LAW for the first time in history of Science to calculate AXIAL VELOCITY (AV) with REASON and ACCURACY.

In the Solar System, the Sun exerts SOLAR REPULSION FORCE (SRF) while planets exert PLANETARY GRAVITATION (PGF). Interaction of SRF x PGF = RETRACTION FORCE (RTF). SRF converts about 50% of PGF in to RTF. So Intensity of PGF = MM/d² is observed. Otherwise the equation would be: PGF = MM/d. RTF keeps planetary bodies, satellites, ringlets, comets and manmade satellites in SPHERICAL MOTION in the Solar System. REVOLUTION and ROTATION of bodies is Spherical Motion.

RTF activates ORBITAL REVOLUTION (OR) and AXIAL ROTATION (AR) of all astronomical and manmade bodies in the Solar System.
RTF acts on planetary bodies in ratio to DENSITY cause OR
RTF acts on planetary bodies in ratio to DIAMETER cause AR

AXIAL ROTATION is activated by RTF. Therefore, AXIAL VELOCITY (AV) is proportional to the intensity of RTF.
AV a RTF

THE LAW OF AXIAL ROTATION:
RTF ACTS ON PLANETARY BODIES IN RATIO PROPORTIONAL TO CUBE- ROOT OF EQUATORIAL DIAMETER (ED) OF PLANETS.

AXIAL VELOCITY IS PROPORTIONAL TO CUBE-ROOT OF EQUATORIAL DIAMETER (ED) OF PLANETS

AV is proportional to Cube-root of Diameter. Therefore, planets, which are large having greater diameter, rotates at higher velocity than smaller planets. Planets Jupiter and Saturn rotate in highest velocity while planets Mercury and Pluto rotate at lowest velocity.
Let us compute AV of nine planets by the NEW LAW of AV (LAV)