Mu Muscae
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Musca |
Right ascension | 11h 48m 14.53576s[1] |
Declination | −66° 48′ 53.6688″[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 (Rv) | ±2.8 +37.4[5] km/s |
Proper motion (μ) | RA: −21.37[1] mas/yr Dec.: −29.98[1] mas/yr |
Parallax (π) | 8.97 ± 0.27[1] mas |
Distance | 360 ± 10 ly (111 ± 3 pc) |
Absolute magnitude (MV) | −0.85[6] |
Details | |
Luminosity | 465[7] L☉ |
Temperature | 4,086[7] K |
Other designations | |
Database references | |
SIMBAD | data |
Mu Muscae, Latinized from μ Muscae, is a solitary[9] star in the southern constellation of Musca. It is visible to the naked eye with an apparent visual magnitude of around 4.75.[4] Based upon an annual parallax shift of 8.97 mas as seen from Earth, it is located about 360 light years from the Sun.
This is an evolved K-type giant star with a stellar classification of K4 III.[3] It most likely on the red giant branch, rather than the asymptotic giant branch, and shows no signs of mass loss. Mu Muscae is an oxygen-rich irregular variable with a small amplitude[10] that varies in visual magnitude between 4.71 and 4.76.[11] It is radiating 465 times the luminosity of the Sun from its photosphere at an effective temperature of 4,086 K.[7]
References
- 1 2 3 4 5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- 1 2 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.
- 1 2 Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- 1 2 3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data, SIMBAD, Bibcode:1986EgUBV........0M.
- ↑ 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, 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.
- 1 2 3 McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
- ↑ "* mu. Mus". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-03-14.
- ↑ 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.
- ↑ 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.
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