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Nu Aurigae

Coordinates:Sky map05h 51m 29.4s, +39° 08′ 54.5″
From Wikipedia, the free encyclopedia
Variable star in the constellation Auriga
ν Aurigae
Location of ν Aurigae (circled)
Observation data
Epoch J2000      Equinox J2000
ConstellationAuriga
Right ascension05h 51m 29.36946s[1]
Declination+39° 08′ 54.6861″[1]
Apparent magnitude (V)3.957[2]
Characteristics
Spectral typeG9.5 III Fe1 Ba0.2 + wd[3]
U−Bcolor index+1.084[2]
B−Vcolor index+1.138[2]
R−Icolor index0.56
Astrometry
Radial velocity (Rv)+9.92 ± 0.14[4] km/s
Proper motion (μ)RA: +7.958mas/yr[1]
Dec.: +0.713mas/yr[1]
Parallax (π)16.1414±0.4427 mas[1]
Distance202 ± 6 ly
(62 ± 2 pc)
Absolute magnitude (MV)−0.27[5]
Details
Mass2.12[6] M
Radius17.85+0.51
−0.53
[7] R
Luminosity126±8[7] L
Surface gravity (log g)2.4[4] cgs
Temperature4,576±50[7] K
Metallicity [Fe/H]–0.14[4] dex
Rotational velocity (v sin i)5.0[4] km/s
Age1.11[6] Gyr
Other designations
ν Aur, 32 Aurigae,ADS 4440,BD+39 1429,FK5 221,HD 39003,HIP 27673,HR 2012,SAO 58502.[8]
Database references
SIMBADdata

Nu Aurigae,Latinised from ν Aurigae, is theBayer designation for astar in thenorthernconstellation ofAuriga. It is visible to the naked eye with anapparent visual magnitude of 3.96[2] and is approximately 200light-years (61parsecs) distant from the Earth.[1] This is anevolvedgiant star with astellar classification of G9.5 III.[9] It is ared clump star, which indicates that it is generating energy through thefusion ofhelium at its core.[10] Theouter envelope has expanded to 18 times theradius of the Sun and cooled to4,576 K,[7] giving it the characteristic yellow-hued glow of aG-type star.[11] It shines with 126 times theluminosity of the Sun.[7]

This is anastrometric binary with a suspectedwhite dwarf companion.[3] A 10th-magnitude star 54.6arcseconds away is anoptical companion.

See also

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References

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  1. ^abcdeVallenari, A.; et al. (Gaia collaboration) (2023)."Gaia Data Release 3. Summary of the content and survey properties".Astronomy and Astrophysics.674: A1.arXiv:2208.00211.Bibcode:2023A&A...674A...1G.doi:10.1051/0004-6361/202243940.S2CID 244398875. Gaia DR3 record for this source atVizieR.
  2. ^abcdOja, T. (August 1986), "UBV photometry of stars whose positions are accurately known. III",Astronomy and Astrophysics Supplement Series,65 (2):405–409,Bibcode:1986A&AS...65..405O.
  3. ^abEggleton, 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.
  4. ^abcdMassarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity",The Astronomical Journal,135 (1):209–231,Bibcode:2008AJ....135..209M,doi:10.1088/0004-6256/135/1/209.
  5. ^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.
  6. ^abLuck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants",Astronomical Journal,150 (3), 88,arXiv:1507.01466,Bibcode:2015AJ....150...88L,doi:10.1088/0004-6256/150/3/88,S2CID 118505114.
  7. ^abcdeBaines, Ellyn K.; Thomas Armstrong, J.; Clark, James H.; Gorney, Jim; Hutter, Donald J.; Jorgensen, Anders M.; Kyte, Casey; Mozurkewich, David; Nisley, Ishara; Sanborn, Jason; Schmitt, Henrique R.; Van Belle, Gerard T. (2021)."Angular Diameters and Fundamental Parameters of Forty-four Stars from the Navy Precision Optical Interferometer".The Astronomical Journal.162 (5): 198.arXiv:2211.09030.Bibcode:2021AJ....162..198B.doi:10.3847/1538-3881/ac2431.
  8. ^"* 32 Aur".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved2012-08-19.
  9. ^Eggen, O. J. (1962), "Space-velocity vectors for 3483 stars with proper motion and radial velocity",Royal Observatory Bulletin,51: 79,Bibcode:1962RGOB...51...79E.
  10. ^Valentini, M.; Munari, U. (November 2010),"A spectroscopic survey of faint, high-Galactic-latitude red clump stars. I. The high resolution sample",Astronomy and Astrophysics,522: A79,arXiv:1007.0207,Bibcode:2010A&A...522A..79V,doi:10.1051/0004-6361/201014870,S2CID 119156545.[permanent dead link]
  11. ^"The Colour of Stars".Australia Telescope, Outreach and Education.Commonwealth Scientific and Industrial Research Organisation. December 21, 2004. Archived fromthe original on December 3, 2013. Retrieved2012-01-16.

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