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) | 4.75[2] |
Characteristics | |
Spectral type | K4 III[3] |
U−B color index | +1.89[2] |
B−V color index | +1.54[2] |
Astrometry | |
Radial velocity (Rv) | ±2.8 +37.4[4] 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) |
Details | |
Luminosity | 465[5] L☉ |
Temperature | 4,086[5] K |
Other designations | |
Database references | |
SIMBAD | data |
Mu Muscae (μ Mus) is a solitary[7] star in the southern constellation of Musca. It is visible to the naked eye with an apparent visual magnitude of around 4.75.[2] 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[8] that varies in visual magnitude between 4.71 and 4.76.[9] It is radiating 465 times the luminosity of the Sun from its photosphere at an effective temperature of 4,086 K.[5]
References
- 1 2 3 4 5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357.
- 1 2 3 4 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data, SIMBAD, Bibcode:1986EgUBV........0M.
- 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.
- ↑ 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, Bibcode:2012A&A...546A..61D, arXiv:1208.3048 , doi:10.1051/0004-6361/201219219, A61.
- 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, Bibcode:2012MNRAS.427..343M, arXiv:1208.2037 , doi:10.1111/j.1365-2966.2012.21873.x.
- ↑ "mu. Mus -- Long-period variable star", SIMBAD Astronomical Database, 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, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878 , 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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