Epsilon Muscae

{{Starbox begin

| name = Epsilon Muscae

}}

{{Starbox image

| image = 250px

| caption = A light curve for Epsilon Muscae, plotted from Hipparcos data

}}

{{Starbox observe

| epoch = J2000.0

| equinox = J2000.0 (ICRS)

| constell = Musca

| ra = {{RA|12|17|34.27564}}

| dec = {{DEC|-67|57|38.6525}}

| appmag_v = 4.0{{snd}}4.3

}}

{{Starbox character

| type = asymptotic giant branch

| class = {{nowrap|M5 III}}

| b-v =

| u-b =

| r-i =

| variable = SRb

}}

{{Starbox astrometry

| radial_v = {{Val|7.1|0.7}}

| prop_mo_ra = {{Val|−230.607|0.187}}

| prop_mo_dec = {{Val|−26.206|0.263}}

| pm_footnote =

| parallax = 9.9915

| p_error = 0.2

| parallax_footnote = {{cite DR3|5859405805013401984}}

| absmag_v = −0.77

}}

{{Starbox detail

| mass = {{val|2|0.3}}

| radius = {{val|116|9}}

| luminosity = 1,738

| temperature = {{val|3470|125|fmt=commas}}

| gravity = {{val|0.6|0.02}}

| rotational_velocity =

| age_myr =

}}

{{Starbox catalog

| names = {{odlist|B=eps Mus|CPD=-67 1931|HD=106849|HR=4671|SAO=251830|HIP=59929}}

}}

{{Starbox reference

| Simbad = eps+Musc

}}

Epsilon Muscae, Latinized as ε Muscae, is a red giant star of spectral type M5III in the constellation Musca. It is a 4th magnitude star, visible to the naked eye under good observing conditions. It is about 330 light-years from the Earth.

Originally a main-sequence star of around 2 solar masses, Epsilon Muscae is now on the asymptotic giant branch and has expanded to 117 times the Sun's diameter and 1,700 its luminosity. It is a semiregular variable, varying between visual magnitudes 4.0 and 4.3 in eight distinct periods ranging from a month to over half a year in length. Its distance from the Earth is about the same as the Lower Centaurus–Crux subgroup of the Scorpius–Centaurus association, although it is moving much faster at around 100 km/s and does not share a common origin.

References

{{reflist|refs=

{{cite web

| url=http://stars.astro.illinois.edu/sow/epsmus.html

| title=Epsilon Muscae | last=Kaler | first=Jim|authorlink= James B. Kaler

| work=Stars | publisher=University of Illinois | accessdate=21 December 2013}}

{{Cite journal |last1=Kallinger |first1=T. |last2=Beck |first2=P. G. |last3=Hekker |first3=S. |last4=Huber |first4=D. |last5=Kuschnig |first5=R. |last6=Rockenbauer |first6=M. |last7=Winter |first7=P. M. |last8=Weiss |first8=W. W. |last9=Handler |first9=G. |last10=Moffat |first10=A. F. J. |last11=Pigulski |first11=A. |last12=Popowicz |first12=A. |last13=Wade |first13=G. A. |last14=Zwintz |first14=K. |date=2019-04-01 |title=Stellar masses from granulation and oscillations of 23 bright red giants observed by BRITE-Constellation |doi-access=free |journal=Astronomy & Astrophysics |language=en |volume=624 |pages=A35 |doi=10.1051/0004-6361/201834514 |issn=0004-6361 |arxiv=1902.07531 |bibcode=2019A&A...624A..35K }}

{{cite journal

| last6=Kjeldsen | first6=H.

| title=Long-term photometry and periods for 261 nearby pulsating M giants

| journal=Monthly Notices of the Royal Astronomical Society | volume=400 | issue=4 | year=2009

| pages=1945–1961 | bibcode=2009MNRAS.400.1945T | doi=10.1111/j.1365-2966.2009.15588.x

| doi-access=free | arxiv = 0908.3228 | s2cid=15358380}}

{{cite web

| url=https://cdsarc.cds.unistra.fr/viz-bin/ftp-index?/ftp/cats/more/HIP/cdroms/cats

| website=Centre de Données astronomiques de Strasbourg | title=/ftp/cats/more/HIP/cdroms/cats

| publisher=Strasbourg astronomical Data Center |access-date=15 October 2022}}

{{cite journal |bibcode=2006AstL...32..759G |title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system |last1=Gontcharov |first1=G. A. |journal=Astronomy Letters |date=2006 |volume=32 |issue=11 |page=759 |doi=10.1134/S1063773706110065 |arxiv=1606.08053 }}

{{cite journal

| last1=Eggen | first1=Olin J.

| title=Asymptotic giant branch stars near the sun

| journal=Astronomical Journal

| volume=104 | issue=1 | pages=275–313 | date=July 1992

| doi=10.1086/116239 | bibcode=1992AJ....104..275E }}

{{cite journal

| title=General Catalogue of Variable Stars

| display-authors=1 | last1=Samus | first1=N. N.

| last2=Kazarovets | first2=E. V. | last3=Durlevich | first3=O. V.

| last4=Kireeva | first4=N. N. | last5=Pastukhova | first5=E. N.

| version=5.1 | journal=Astronomy Reports