PU Puppis explained

PU Puppis (PU Pup) is a class B8III (blue giant) star in the constellation Puppis. Its apparent magnitude is 4.69 and it is approximately 620 light years away based on parallax.

It is a β Lyrae variable, ranging from 4.75 to 4.69 magnitude with a period of 2.58 days. The secondary is estimated at 5.6 magnitude, although recent observations have failed to confirm it.^{[1] [2]} The primary has a mass of 4.10 solar masses, and is radiating at an effective temperature of 11,500 K. The secondary, with a mass 65% that of the Sun, has a surface temperature of about 5,000 K.

Notes and References

1. 2001AJ....122.3466M . 10.1086/323920 . The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog . The Astronomical Journal . 122 . 6 . 3466 . 2001 . Mason . Brian D. . Wycoff . Gary L. . Hartkopf . William I. . Douglass . Geoffrey G. . Worley . Charles E. . free . Vizier catalog entry
2. 2014AJ....147..123T . 10.1088/0004-6256/147/5/123 . 1403.4970 . Speckle Interferometry at Soar in 2012 and 2013 . The Astronomical Journal . 147 . 5 . 123 . 2014 . Tokovinin . Andrei . Mason . Brian D. . Hartkopf . William I. . 118489659 .