During this tutorial, we shall try and find the preliminary solution of the UV Leonis binary system. UV Leonis is a detached close binary with coordinates
and
. Data files for this system are acompanying every PHOEBE release and reside in data/UVLeo directory. There are two photometric light curves3 in B and V filters (both from Bessel 1990 series): UVLeo.B and UVLeo.V and two radial velocity curves4: UVLeo.rv1 and UVLeo.rv2 - one for each star.