Gamma Muscae

{{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}}

| dec = {{DEC|−72|07|58.7597}}

| appmag_v = 3.87

}}

{{Starbox character

| class = B5 V

| b-v = −0.15

| u-b = −0.61

| r-i =

| v-r =

| variable = SPB

}}

{{Starbox astrometry

| radial_v = {{Val|2.5|7.4}}

| prop_mo_ra = −51.34

| prop_mo_dec = −5.40

| parallax = 10.04

| p_error = 0.13

| parallax_footnote =

| absmag_v = −1.1

}}

{{Starbox detail

| age_myr = 67.7

| metal_fe =

| mass = 5.09

| radius = 4.17

| gravity = 3.87

| luminosity = 790

| temperature = 15,490

| rotational_velocity = 205

}}

{{Starbox catalog

| names = {{odlist | B=β Vol | CD=−70°997 | FK5=487 | HD=109026 | HIP=61199 | HR=4773 | SAO=257000 | GC=17672 }}

}}

{{Starbox reference

| Simbad = HD+109026

| ARICNS =

}}

γ Muscae, 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. Based upon an annual parallax shift of 10.04 mas as seen from Earth, it is located about 325 light years from the Sun.

File:GammaMusLightCurve.png for Gamma Muscae, plotted from TESS data]]

This is a B-type main-sequence star with a stellar classification of B5 V. 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. It is around five times as massive as the Sun. The star is spinning rapidly with a projected rotational velocity of 205 km/s. This is giving it an oblate shape with an equatorial bulge that is 7% larger than the polar radius.

Gamma Muscae is a proper motion member of the Lower Centaurus–Crux sub-group in the Scorpius–Centaurus OB association, the nearest such association of co-moving massive stars to the Sun.

References

{{reflist|refs

{{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}}

{{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 }} [https://vizier.u-strasbg.fr/viz-bin/VizieR-4 Vizier-4]

{{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=. }}

{{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 }}

{{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

}}

{{citation |postscript=.