Abstract
In this paper, we have constructed many models of the Solar motion and the kinematical properties for a sample of 5100 main sequence stars; into which 1528 early types (B5, A0, A5, F0, and F5) and about 3572 late types (G0, G5, K0, and K5). The sample was collected with aid of Extended Hipparcos Compilation (XHIP) Cross references.
Based on the space velocity vectors (U, V, W), we have computed velocity ellipsoid parameters of the stellar associations under study. For both early and late types, we have derived the following constants: the Galactic longitude l(A), Galactic latitude b(A), the Solar apex (alpha(A), delta(A)), the Solar velocity S-circle dot, the velocity dispersion (sigma(1), sigma(2), sigma(3)), the distance to the Galactic center R-gc, and the projected distances (X-circle dot, Y-circle dot, Z(circle dot)).