SIMBAD references

We report photometric and spectroscopic observations of the nova-like variable V751 Cygni. The radial velocities indicate an underlying binary period of 0.1445(2) day; the long-term cycle count is not firmly decided, but the best choice implies a period of 0.144464(1) day. The star shows a moderately low excitation spectrum with transient P Cygni absorption suggestive of a wind origin, occasionally seen in cataclysmic variables accreting at a high rate. Curiously, the P Cygni absorption appears correlated with binary phase in our two most extensive data sets. A photometric wave with P=0.1394(1) day, slightly shorter than P_orb, rumbles through the light curve, as well as a low-frequency wiggle at 3.94(6) days. We identify the former as a ``negative superhump'' and the latter as the wobble period of a tilted accretion disk. These characteristics all suggest classification as an ordinary, accretion-powered cataclysmic variable of the VY Sculptoris class. We discuss possible origins for the observed soft X-rays at quiescence.