Mu Normae

{{Starbox begin

| name = μ Normae

}}

{{Starbox image

| image=

{{Location mark

|image=Norma constellation map.svg

|float=center

|alt=

|label=

|position=right

|width=280

|mark=Red circle.svg

|mark_width=10

|mark_link=Mu Normae

|x=308|y=264

}}

|caption=Location of μ Nor (circled)

}}

{{Starbox observe

| epoch = J2000.0

| equino = J2000.0

| constell = Norma

| pronounce =

| ra = {{RA|16|34|05.01936}}

| dec = {{DEC|-44|02|43.1206}}

| appmag_v = 4.91 {{nowrap|(4.87 - 4.98)}}

}}

{{Starbox character

| class = O9.7Iab{{cite journal|author1=Sota, A. |author2=Maíz Apellániz, J. |author3=Morrell, N.I. |author-link3=Nidia Morrell |author4=Barbá, R.H. |author5=Walborn, N.R. |author6=Gamen, R.C. |author7=Arias, J.I. |author8=Alfaro, E.J. |date=2014|title=The Galactic O-Star Spectroscopic Survey (GOSSS). II. Bright Southern Stars|journal=The Astrophysical Journal Supplement|volume=211|issue=1|id=10|pages=84|doi=10.1088/0067-0049/211/1/10 |bibcode=2014ApJS..211...10S|arxiv = 1312.6222 |s2cid=118847528 }}

| appmag_1_passband = U

| appmag_1 = 4.05{{cite journal|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|last1=Ducati|first1=J. R.|year=2002}}

| appmag_2_passband = B

| appmag_2 = 4.99

| appmag_3_passband = J

| appmag_3 = 4.74

| appmag_4_passband = H

| appmag_4 = 4.679{{cite journal |bibcode=2003yCat.2246....0C |title=VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) |journal=CDS/ADC Collection of Electronic Catalogues |pages=II/246 |volume=2246 |last1=Cutri |first1=Roc M. |last2=Skrutskie |first2=Michael F. |last3=Van Dyk |first3=Schuyler D. |last4=Beichman |first4=Charles A. |last5=Carpenter |first5=John M. |last6=Chester |first6=Thomas |last7=Cambresy |first7=Laurent |last8=Evans |first8=Tracey E. |last9=Fowler |first9=John W. |last10=Gizis |first10=John E. |last11=Howard |first11=Elizabeth V. |last12=Huchra |first12=John P. |last13=Jarrett |first13=Thomas H. |last14=Kopan |first14=Eugene L. |last15=Kirkpatrick |first15=J. Davy |last16=Light |first16=Robert M. |last17=Marsh |first17=Kenneth A. |last18=McCallon |first18=Howard L. |last19=Schneider |first19=Stephen E. |last20=Stiening |first20=Rae |last21=Sykes |first21=Matthew J. |last22=Weinberg |first22=Martin D. |last23=Wheaton |first23=William A. |last24=Wheelock |first24=Sherry L. |last25=Zacarias |first25=N. |year=2003 |url=http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=II/246 }}

| appmag_5_passband = K

| appmag_5 = 4.612

| appmag_6_passband =

| appmag_6 =

| appmag_7_passband =

| appmag_7 =

| appmag_8_passband =

| appmag_8 =

| r-i =

| v-r =

| b-v = +0.05

| u-b = −0.84

| j-h =

| j-k =

| variable = Suspected α Cygni{{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007–2013)|journal=VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S|volume=1|pages=02025|last1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009|display-authors=etal}}

}}

{{Starbox astrometry

| radial_v = +6.30{{cite journal|bibcode= 2006AstL...32..759G|title= Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system|journal= Astronomy Letters|volume= 32|issue= 11|pages= 759–771|last1= Gontcharov|first1= G. A.|year= 2006|doi= 10.1134/S1063773706110065|arxiv = 1606.08053 |s2cid= 119231169}}

| prop_mo_ra = +0.865

| prop_mo_dec = −2.985

| parallax = 1.0967

| p_error = 0.1007

| parallax_footnote ={{cite Gaia DR3|5944296074139193984}}

| dist_ly = 3,260

| dist_pc = 1,000{{Cite journal | doi = 10.1086/498560| title = The Discordance of Mass-Loss Estimates for Galactic O-Type Stars| year = 2006| last1 = Fullerton | first1 = A. W.| last2 = Massa | first2 = D. L.| last3 = Prinja | first3 = R. K.| journal = The Astrophysical Journal| volume = 637| issue = 2| pages = 1025–1039| bibcode = 2006ApJ...637.1025F|arxiv = astro-ph/0510252 | s2cid = 119339006}}

| absmag_v = −6.45

}}

{{Starbox detail

| source = {{cite journal|bibcode=2010MNRAS.404.1306F|arxiv=1001.3337|title=Atmospheric parameters and rotational velocities for a sample of Galactic B-type supergiants|journal=Monthly Notices of the Royal Astronomical Society|volume=404|pages=1306|last1=Fraser|first1=M.|last2=Dufton|first2=P. L.|last3=Hunter|first3=I.|last4=Ryans|first4=R. S. I.|year=2010|issue=3|doi=10.1111/j.1365-2966.2010.16392.x|doi-access=free |s2cid=118674151}}

| mass = 33.3

| radius = 25

| gravity = 2.90

| luminosity =

| luminosity_bolometric = 339,000{{Cite journal | doi = 10.1051/0004-6361:20066038| title = Statistical properties of a sample of periodically variable B-type supergiants| year = 2007| last1 = Lefever | first1 = K.| last2 = Puls | first2 = J.| last3 = Aerts | first3 = C.| journal = Astronomy and Astrophysics| volume = 463| issue = 3| pages = 1093–1109| bibcode = 2007A&A...463.1093L|arxiv = astro-ph/0611484 | s2cid = 8783008| url = http://www.aanda.org/articles/aa/pdf/2007/09/aa6038-06.pdf}}

| luminosity_visual =

| temperature = 28,000

| metal =

| rotation =

| rotational_velocity = 57

| age_myr = 4.7{{cite journal|bibcode= 2011MNRAS.410..190T|title= A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun|journal= Monthly Notices of the Royal Astronomical Society|volume= 410|pages= 190–200|last1= Tetzlaff|first1= N.|last2= Neuhäuser|first2= R.|last3= Hohle|first3= M. M.|year= 2011|issue= 1|doi= 10.1111/j.1365-2966.2010.17434.x|doi-access= free|arxiv = 1007.4883 |s2cid= 118629873}}

| age_gyr =

}}

{{Starbox catalog

| names = Mu Normae, HD 149038, HR 6155, HIP 81122, CD−43°10900

}}

{{Starbox reference

|Simbad=HR+6155

}}

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

File:MuNorLightCurve.png for Mu Normae, plotted from TESS data{{cite web

| title=MAST: Barbara A. Mikulski Archive for Space Telescopes

| url=https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html

| publisher=Space Telescope Science Institute | access-date=27 September 2024}}

]]

It shines as bright as 339,000 Suns and weighs 40 solar masses. It varies in visual magnitude between 4.87 and 4.98, and is suspected of being an Alpha Cygni variable, which are named after 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.{{cite journal

| last = Collinder

| first = Per

| date = 1931

| title = On Structural Properties of Open Galactic Clusters and their Spatial Distribution. Catalog of Open Galactic Clusters

| journal = Annals of the Observatory of Lund

| volume = 2

| pages = B1–B46

| bibcode = 1931AnLun...2....1C

}}