NW Puppis
NW Puppis, also known as υ2 Puppis, is a star in the constellation Puppis. Located around 910 light-years distant, it shines with a luminosity approximately 2,000 times that of the Sun and has a surface temperature of.
The star's variability was first detected in 1970, and announced by Armand van Hoof in 1973. It was given its variable [star designation] in 1977. Anamarija Stankov ruled this star out as a Beta [Cephei variable], but the GCVS and the International Variable Star Index classify it as both a Beta Cephei variable and a rotating ellipsoidal variable. The GCVS lists its period as 0.125 days, but the TESS data shows lower frequency and stochastic brightness variations.
Neither component of this double is given a letter in Lacaille's catalogue or the British Association star catalogue. Gould gave them the designations v1 and v2 Puppis, but these are rarely used. Lacaille applied the Greek letter υ to the star now called υ Carinae. The designation υ2 first appeared in several catalogues at the end of the 19th century.