Astronomy:Mu Sculptoris

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Short description: Star in the constellation Sculptor
Mu Sculptoris
Sculptor constellation map.svg
Red circle.svg
Location of μ Sculptoris (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Sculptor
Right ascension  23h 40m 38.14898s[1]
Declination −32° 04′ 23.2478″[1]
Apparent magnitude (V) 5.30[2] (5.30 – 5.33)[3]
Characteristics
Evolutionary stage giant
Spectral type K1 III[4]
U−B color index +0.69[5]
B−V color index +0.97[6]
Variable type suspected[3]
Astrometry
Radial velocity (Rv)+15.79±0.12[1] km/s
Proper motion (μ) RA: −91.30[7] mas/yr
Dec.: −53.29[7] mas/yr
Parallax (π)11.6622 ± 0.1228[1] mas
Distance280 ± 3 ly
(85.7 ± 0.9 pc)
Absolute magnitude (MV)0.54[2]
Details
Mass1.32[8] M☉
Radius10.88+0.16
−0.13[1] R☉
Luminosity61.4±0.8[1] L☉
Surface gravity (log g)2.50[8] cgs
Temperature4,899+29
−35[1] K
Metallicity [Fe/H]−0.21[2] dex
Rotational velocity (v sin i)2.6[9] km/s
Other designations
μ Scl, NSV 14661, CD−32°17621, FK5 1618, GC 32888, HD 222433, HIP 116820, HR 8975, SAO 214701, GSC 07515-01148[10]
Database references
SIMBADdata

μ Sculptoris, Latinized as Mu Sculptoris, is a solitary,[11] orange-hued star in the southern constellation of Sculptor. It is visible to the naked eye as a dim point of light with an apparent visual magnitude of +5.30.[2] This star is located approximately 291 light years from the Sun based on parallax,[7] and it is drifting further away with a radial velocity of +16 km/s.[1]

This object is an aging K-type giant star with a stellar classification of K1 III.[4] Having exhausted the supply of hydrogen at its core, this star expanded and cooled off the main sequence. At present it has 11[1] times the girth of the Sun. It is a suspected variable star of unknown type, with its brightness measured as varying from magnitude 5.30 down to 5.33.[3] The star has 1.32[8] times the mass of the Sun and is radiating 61[1] times the Sun's luminosity from its swollen photosphere at an effective temperature of 4899 K.[1]

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.  Vizier catalog entry
  3. ↑ 3.0 3.1 3.2 Samus, N. N. et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1 61 (1): 80–88. doi:10.1134/S1063772917010085. Bibcode: 2017ARep...61...80S. 
  4. ↑ 4.0 4.1 Hoffleit, D.; Warren, W. H. (1995). "Bright Star Catalogue". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H 5050. Bibcode: 1995yCat.5050....0H. 
  5. ↑ Mermilliod, J. C. (2006). "Homogeneous Means in the UBV System". VizieR On-line Data Catalog: II/168. Originally Published in: Institut d'Astronomie 2168. Bibcode: 2006yCat.2168....0M. Vizier catalog entry
  6. ↑ Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers 42 (2): 443. Bibcode: 2014JAVSO..42..443M. Vizier catalog entry
  7. ↑ 7.0 7.1 7.2 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.  Vizier catalog entry
  8. ↑ 8.0 8.1 8.2 Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics 352: 555–562. Bibcode: 1999A&A...352..555A.  Vizier catalog entry
  9. ↑ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. Bibcode: 2014A&A...561A.126D.  Vizier catalog entry
  10. ↑ "mu Scl". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=mu+Scl. 
  11. ↑ 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. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E. 



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