  The no-longer-eclipsing system SS Lac in the young open cluster NGC 7209 has
been recently announced to show a constant radial velocity. Puzzled by this
finding, we have monitored the system during 1997 obtaining 24 Echelle+CCD
spectra over 8 orbital revolutions. Our spectra reveal a nice orbital motion
with periodic splitting and merging of spectral lines from both components. An
accurate orbit has been derived, together with individual masses of the stars.
SS Lac presents a moderately eccentric orbit and a probably full
synchronization between stellar rotation and orbital revolution.
