Institute of Theoretical Astronomy RAS,
St.Petersburg, 191187, Russia
The discovery of the correlations between the rotational and orbital parameters is important to study the problem of the origin and evolution of the different asteroid populations. In this paper the sample of the Near-Earth asteroids (NEA's) with known rotation periods P and diameters D is considered. As already was found in our previous work the interesting connection of the period with the diameter is revealed for these NEA's. Now the correlation coefficients q(D,P) are calculated for the whole group of NEA's and for the sub-groups. The division on the sub- groups are seen from the analysis P-D relation. Next we seek to examine the correlations of a surface rotational velocity v on an asteroid equator with the semimajor axis a, the eccentricity e and the inclination i of the asteroid orbit. The computations of the circular orbital velocity V and also a function W(a,e,sin i), which is proportional to the square of the average relative velocity and is a measure of the expected average collisional energy are fulfilled. The correlations of the rotational velocity v with V and W were examined too by a computation of the correlation coefficients q(v,V) and q(v,W). No significant correlation is evident if the whole sample of NEA's is considered.