RX J1643.7+3402 : Bright cataclysmic variable in the period gap
According to astro-ph/0108377 (Mickaelian et al., A&A in press),
RX J1643.7+3402 is identified with a bright (V=12.6) cataclysmic
variable. The likely orbital period lies in the period gap.
Further long-term coverage is clearly needed
(vsnet-campaign 1134).