Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Kappa Velorum is a binary star in the constellation Vela. It also has the traditional name Markab, often spelled Markeb to distinguish it from similarly named stars such as Alpha Pegasi. Kappa Velorum is spectroscopic binary which is classified as a blue-white B-type subgiant with an apparent magnitude of +2.47. It is approximately 539 light years from Earth. The two components complete one orbit every 116.65 days.