Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. k Puppis is a Bayer designation given to an optical double star in the constellation Puppis, the two components being k1 Puppis and k2 Puppis. Note that the designation here is "k" not "kappa" as some astronomers teach. Many of Puppis' stellar designations are English labels. This pair of stars is given the traditional Arabic name Markeb or Markab. Both k1 Puppis and k2 Puppis are bright blue B-type giant stars of nearly equal brightness, +4.50 and +4.62, respectively. To the naked eye, the pair has a combined magnitude of +3.80.