Mu Normae
μ Normae, Latinised as Mu Normae, is a blue supergiant star of spectral type O9.7 Iab in the constellation Norma.
It is 339,000 times the luminosity of the sun and 40 times its mass. It varies in visual magnitude between 4.87 and 4.98, and is suspected of being an Alpha Cygni variable, which are named after the similar star Deneb.
It is in the same direction and at the same distance as the faint open cluster NGC 6169, although it is brighter than the combined magnitude of all the other stars in the cluster. It was considered the prototype of the μ Normae class of open clusters by Collinder.
