Mu Normae

μ Norμ Normae
μ Normae, Latinised as Mu Normae, is a blue supergiant star of spectral type O9.7 Iab in the constellation Norma.wikipedia
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Norma (constellation)

NormaNorconstellation Norma
μ Normae, Latinised as Mu Normae, is a blue supergiant star of spectral type O9.7 Iab in the constellation Norma.
Mu Normae is one of the most luminous stars known, with a luminosity between a quarter million and one million times that of the Sun.

Blue supergiant star

blue supergiantBlueblue supergiants
μ Normae, Latinised as Mu Normae, is a blue supergiant star of spectral type O9.7 Iab in the constellation Norma.

Apparent magnitude

apparent visual magnitudemagnitudevisual magnitude
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.

Alpha Cygni variable

α Cyg variableα Cygni variableAlpha Cygni type
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.

Deneb

Alpha CygniAridedα Cyg
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.

Open cluster

open star clusterstar clusteropen clusters
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.

NGC 6169

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.

Per Collinder

CollinderPer Arne Collinder
It was considered the prototype of the μ Normae class of open clusters by Collinder.

Stellar classification

spectral typeK-typeG-type
Fractional numbers are allowed; for example, the star Mu Normae is classified as O9.7.