Kepler’s constant and WDS orbit

The aim of this work are to find a Kepler’s constant by using polynomial regression of the angular separation ρ= ρ(t) and the position angle θ=θ(t). The Kepler’s constant obtained is used to derive the elements of orbit. As a case study the angular separation and the position angle of the WDS 00063 +5826 and the WDS 04403 +5857 were investigated. For calculating the element of orbit the Thiele-Innes van den Bos method is used. The rough data of the angular separation ρ= ρ(t) and the position angle θ=θ(t) are taken from the US Naval Observatory, Washington. This work also presents the masses and absolute bolometric magnitudes of each star. These stars include into the main-sequence stars with the spectral class G5V for WDS 04403-5857 and the type of spectrum G3V for WDS 00063 +5826. The life time of the primary star and the secondary star of WDS 04403-5857 nearly equal to 2×10^10 years. The life time of the primary star and the secondary star of WDS 00063+5826 are 2×10^10 years and 1,9×10^10 years, respectively.