THE ORBITAL PERIOD OF BK-LYNCIS (PG-0917+342)

Long-term light curves of the cataclysmic variable BK Lyn = PG 0917 342 from the Indiana Automated CCD photometric telescope ('RoboScope') and the Harvard College Observatory plate archive reveal no dwarf nov a outbursts. Two radial velocity studies show its orbital period to be 107.97 +/- 0.07 min, confirming that it does have an orbital period s horter than the period gap for cataclysmic variables. Whether this is the first nova-like variable below the period gap or a dwarf nova with rare outbursts resembling WZ Sge is still unclear, however.