Mu Muscae

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Mu Muscae

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Mu Muscae
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Musca
Right ascension	11^h 48^m 14.53282^s^[1]
Declination	−66° 48′ 53.6712″^[1]
Apparent magnitude (V)	4.6 - 4.8^[2]
Characteristics
Spectral type	K4 III^[3]
U−B color index	+1.89^[4]
B−V color index	+1.54^[4]
Variable type	Lb^[2]
Astrometry

Radial velocity (R_v)	+37.4±2.8^[5] km/s
Proper motion (μ)	RA: −31.223^[1] mas/yr Dec.: −15.938^[1] mas/yr
Parallax (π)	7.2113 ± 0.1762 mas^[1]
Distance	450 ± 10 ly (139 ± 3 pc)
Absolute magnitude (M_V)	−0.85^[6]

Details

Radius	52.92+1.01 −0.95^[1] `R`_☉
Luminosity	602.0±16.9^[1] `L`_☉
Temperature	3,930+36 −37^[1] K

Other designations
μ Mus, CD−66° 1114, HD 102584, HIP 57581, HR 4530, SAO 251597^[7]
Database references
SIMBAD	data

Mu Muscae, Latinized from μ Muscae, is a solitary^[8] star in the southern constellation of Musca. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of around 4.75.^[4] Based upon an annual parallax shift of 7.21 mas as seen from Earth, it is located about 450 light years from the Sun. The star is drifting further away with a radial velocity of +37 km/s.^[5]

This is an evolved K-type giant star with a stellar classification of K4 III,^[3] having exhausted the supply of hydrogen at its core then cooled and expanded to 53^[1] times the Sun's radius. It most likely on the red giant branch, rather than the asymptotic giant branch, and shows no signs of mass loss. Mu Muscae is a type Lb, oxygen-rich irregular variable with a small amplitude^[9] that ranges in visual magnitude between 4.71 and 4.76.^[10] It is radiating 602 times the luminosity of the Sun from its photosphere at an effective temperature of 3,930 K.^[1]

References

[edit]

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ ^a ^b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
^ ^a ^b Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
^ ^a ^b ^c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, SIMBAD, Bibcode:1986EgUBV........0M.
^ ^a ^b de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
^ "* mu. Mus". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-03-14.{{cite web}}: CS1 maint: postscript (link)
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
^ Kerschbaum, F. (November 1999), "Irregular variables of type Lb. Energy distributions and stellar parameters", Astronomy and Astrophysics, 351: 627–634, Bibcode:1999A&A...351..627K.
^ BSJ (October 31, 2011), "Mu Muscae", AAVSO Website, American Association of Variable Star Observers, retrieved 2017-03-15.

Constellation of Musca

Stars

Bayer	α β γ δ ε ζ¹ ζ² η θ ι¹ ι² λ μ λ Cha
Variable	R S T Y RT SY TU TV UU BO EZ FH GQ GR GU GS GT KR KY KZ LS MP V357 V415
HR	4387 4389 4401 4406 4425 4448 4485 4538 4549 4596 4597 4601 4604 4611 4614 4615 4664 4669 4692 4710 4720 4769 4804 4841 4862 4907 4966 4977 4994 5000 5002 5012 5030 5049 5069 5093 5119
HD	98671 101805 103482 105822 111232 112410 113919
Other	Gliese 440 PSR J1141−6545 TYC 8998-760-1

Exoplanets	HD 111232 b YSES 2 b

Star clusters	NGC 4372 NGC 4463 NGC 4815 NGC 4833

Nebulae

NGC	5189
Other	BHR 71 Dark Doodad Nebula Engraved Hourglass Nebula