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We report the serendipitous discovery of a heavily reddened Wolf-Rayet starthat we name WR142b. While photometrically monitoring a cataclysmic variable,we detected weak variability in a nearby field star. Low-resolutionspectroscopy revealed a strong emission line at 7100 Ang., suggesting anunusual object and prompting further study. A spectrum taken with theHobby-Eberly Telescope confirms strong HeII emission and a NIV 7112 Ang. lineconsistent with a nitrogen-rich Wolf-Rayet star of spectral class WN6. Analysisof the HeII line strengths reveals no detectable hydrogen in WR142b. Ablue-sensitive spectrum obtained with the Large Binocular Telescope shows noevidence for a hot companion star. The continuum shape and emission line ratiosimply a reddening of E(B-V)=2.2 to 2.5 mag. If not for the dust extinction,this new Wolf-Rayet star could be visible to the naked eye.

Discovery of a Wolf-Rayet Star Through Detection of its Photometric Variability