Abstract
ABSTRACT Spectroscopic observations which reveal Lanning 90 to be a previously uncataloged cataclysmic variable are presented. Low-resolution spectra of the object display strong and broad emission lines of hydrogen and neutral helium superimposed on a continuum with roughly constant F-lambda. In addition to the Balmer and He I emision lines, the spectrum shows high excitation lines of He II, C II, C III, and N III. After a brief discussion of its general spectral character, it is argued that Lanning 90 is probably a nova-like variable. It is noted that the photometric and spectroscopic variability exhibited by the object is similar to the variability shown by the AM Herculis systems.
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