Orbital elements for double stars of Population II. The system HD 29907

For HD 29907 results are presented from radial-velocity monitoring and from photometric observations on the uvby system. The object is a binary system at a distance of around 50 parsecs from the sun. The primary component is a G2 VI star. The secondary component remains unidentified. The absolute visual magnitude of the primary component is MV=+6.6, and the effective temperature and abundance of heavy elements are given by ${\rm log}\, T_{\rm e}=3.726$ and [Fe/H]=-1.7, respectively. The V magnitude appears variable with a range of at least 0.12 magnitudes. Colour indices appear stable. The system has a radial velocity of $\rm +67.6 km\,s^{-1}$, an orbital period of 29.9 days and an eccentricity of 0.41. The total space velocity with respect to the galactic center is 340 $\rm km\,s^{-1}$ and the object approaches escape velocity.