Physical parameters' conventions

Semi-major axis: measured in solar radii, $R_\odot = 696 000$km. It is a sum the two absolute semi-major axes: $a = a_1 + a_2$.

Orbital inclination: measured in degrees, with respect to the plane of the sky. If the inclination is in range $0^o$ to $90^o$, the binary orbits counter-clockwise as projected onto the plane of the sky, while above $90^o$ it orbits clockwise.