{{Short description|Star in the constellation Musca}} {{Starbox begin | name = γ Muscae }} {{Starbox image | image = {{Location mark | image=Musca IAU.svg | float=center | width=240 | position=right | mark=Red circle.svg | mark_width=10 | mark_link=β Vol | x%=49.8 | y%=51.6 }} | caption=Location of γ Muscae (circled) }} {{Starbox observe | epoch = [[J2000.0]] | constell = [[Musca]] | ra = {{RA|12|32|28.01343}}<ref name=aaa474_2_653/> | dec = {{DEC|−72|07|58.7597}}<ref name=aaa474_2_653/> | appmag_v = 3.87<ref name=clpl4_99/> }} {{Starbox character | type = [[main sequence]]<ref name=romanvuk2012/><ref name=dr3/> | class = B5 V<ref name=vanBelle2012/> | b-v = −0.15<ref name=clpl4_99/> | u-b = −0.61<ref name=clpl4_99/> | r-i = | v-r = <!--NoData--> | variable = SPB }} {{Starbox astrometry | radial_v = {{Val|2.5|7.4}}<ref name=Gontcharov2006/> | prop_mo_ra = −51.34<ref name=aaa474_2_653/> | prop_mo_dec = −5.40<ref name=aaa474_2_653/> | parallax = 10.04 | p_error = 0.13 | parallax_footnote = <ref name=aaa474_2_653/> | absmag_v = −1.1<ref name=aaa216_1_44/> }} {{Starbox detail | age_myr = 67.7<ref name=Glagolevskij2019/> | metal_fe = | mass = 5.09<ref name=Glagolevskij2019/> | radius = 4.17<ref name=Glagolevskij2019/> | gravity = 3.87<ref name=Glagolevskij2019/> | luminosity = 790<ref name=aaa216_1_44/> | temperature = 15,490<ref name=Glagolevskij2019/> | rotational_velocity = 205<ref name=vanBelle2012/> }} {{Starbox catalog | names = {{odlist | B=γ Mus | CD=−70°997 | FK5=487 | HD=109026 | HIP=61199 | HR=4773 | SAO=257000 | GC=17672 }} }} {{Starbox reference | Simbad = HD+109026 | ARICNS = <!--Code--> }} {{Starbox end}}
'''γ Muscae''', [[Romanization of Greek|Latinised]] as '''Gamma Muscae''', is a blue-white hued [[star]] in the southern [[circumpolar constellation]] of [[Musca]], the [[Fly]]. It can be seen with the naked eye, having an [[apparent visual magnitude]] of 3.87.<ref name=clpl4_99/> Based upon an annual [[stellar parallax|parallax shift]] of 10.04 [[milliarcsecond|mas]] as seen from Earth, it is located about 325 [[light year]]s from the [[Sun]].
[[File:GammaMusLightCurve.png|thumb|left|A [[light curve]] for Gamma Muscae, plotted from ''[[Transiting Exoplanet Survey Satellite|TESS]]'' data<ref name=MAST/>]] This is a [[B-type main-sequence star]] with a [[stellar classification]] of B5 V.<ref name=vanBelle2012/> It is a [[variable star]] that ranges between magnitudes 3.84 and 3.86 over a period of 2.7 days, and is classed as a [[slowly pulsating B star]].<ref name=AAVSOgam/><!-- cites previous 1.5 sentences --> It is around five times as massive as the [[Sun]].<ref name=MolendaZakowicz2004/> The star is spinning rapidly with a [[projected rotational velocity]] of 205 km/s. This is giving it an [[oblate spheroid|oblate]] shape with an [[equatorial bulge]] that is 7% larger than the polar radius.<ref name=vanBelle2012/>
Gamma Muscae is a [[proper motion]] member of the Lower Centaurus–Crux sub-group in the [[Scorpius–Centaurus association|Scorpius–Centaurus]] [[Stellar association|OB association]], the nearest such association of co-moving massive stars to the Sun.<ref name=aaa216_1_44/> {{clear left}}
==References== {{reflist|refs
<ref name=MAST>{{citation | postscript=. | 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=23 September 2022}}</ref>
<ref name=Glagolevskij2019>{{citation | title=On Properties of Main Sequence Magnetic Stars | last=Glagolevskij | first=Yu. V. | journal=Astrophysical Bulletin | postscript=. | volume=74 | issue=1 | pages=66–79 | date=January 2019 | doi=10.1134/S1990341319010073 | bibcode=2019AstBu..74...66G | s2cid=255384587 }}</ref>
<ref name=aaa474_2_653>{{citation | first1=F. | last1=van Leeuwen | date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | arxiv=0708.1752 | s2cid=18759600 | postscript=. }}</ref>
<ref name=MolendaZakowicz2004>{{citation |postscript=. | last1=Molenda-Zakowicz | first1=J.| last2=Połubek | first2=G. | title=Empirical absolute magnitudes, luminosities and effective temperatures of SPB variables and the problem of variability classification of monoperiodic stars | journal=Acta Astronomica | volume=54 | pages=281–97 [283] | year=2004 | bibcode=2004AcA....54..281M }}</ref>
<ref name=Gontcharov2006>{{citation | last1=Gontcharov | first1=G. A. | title=Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system | journal=Astronomy Letters | postscript=. | volume=32| issue=11| pages=759–771| date=November 2006 | doi=10.1134/S1063773706110065| bibcode=2006AstL...32..759G | arxiv=1606.08053 | s2cid=119231169 }}</ref>
<ref name=AAVSOgam>{{citation |postscript=. | url=http://www.aavso.org/vsx/index.php?view=detail.top&oid=19956 | title=Gamma Muscae | last=BSJ | date=5 March 2012 | work=AAVSO Website | publisher=[[American Association of Variable Star Observers]] | accessdate=21 December 2013 }}</ref>
<ref name=clpl4_99>{{citation | display-authors=1 | last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | year=1966 | page=99 | bibcode=1966CoLPL...4...99J | postscript=. }}</ref>
<ref name=vanBelle2012>{{citation | last1=van Belle | first1=Gerard T. | title=Interferometric observations of rapidly rotating stars | journal=The Astronomy and Astrophysics Review | volume=20 | issue=1 | page=51 | date=March 2012 | doi=10.1007/s00159-012-0051-2 | bibcode=2012A&ARv..20...51V | arxiv=1204.2572 | s2cid=119273474 | postscript=. }}</ref>
<ref name=aaa216_1_44>{{citation | display-authors=1 | last1=de Geus | first1=E. J. | last2=de Zeeuw | first2=P. T. | last3=Lub | first3=J. | title=Physical parameters of stars in the Scorpio-Centaurus OB association | journal=Astronomy and Astrophysics | volume=216 | issue=1–2 | pages=44–61 | date=June 1989 | bibcode=1989A&A...216...44D | postscript=. }}</ref>
<ref name=romanvuk2012>{{cite journal |last1=Romanyuk |first1=I. I. |last2=Yakunin |first2=I. A. |title=Magnetic B-type stars of the main sequence. I. Problem formulation and selection of objects for observations |journal=Astrophysical Bulletin |date=2012 |volume=67 |issue=2 |page=177 |doi=10.1134/S1990341312020058 |bibcode=2012AstBu..67..177R }}</ref>
<ref name=dr3>{{cite Gaia DR3|5842864786417716608}}</ref>
}}
{{Musca}}
<!-- Properties --> [[Category:B-type main-sequence stars]] [[Category:Slowly pulsating B-type stars]] [[Category:Lower Centaurus Crux]] <!-- Other --> [[Category:Musca]] [[Category:Bayer objects|Muscae, Gamma]] [[Category:Durchmusterung objects]] [[Category:Henry Draper Catalogue objects|109026]] [[Category:Hipparcos objects|061199]] [[Category:Bright Star Catalogue objects|4773]]