Nu Aurigae

ν Aurigae

Location of ν Aurigae (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Auriga
Right ascension	05^h 51^m 29.36946^s[1]
Declination	+39° 08′ 54.6861″[1]
Apparent magnitude (V)	3.957[2]
Characteristics
Spectral type	G9.5 III Fe1 Ba0.2 + wd[3]
U−B color index	+1.084[2]
B−V color index	+1.138[2]
R−I color index	0.56
Astrometry
Radial velocity (Rv)	+9.92 ± 0.14[4] km/s
Proper motion (μ)	RA: +7.958 mas/yr[1] Dec.: +0.713 mas/yr[1]
Parallax (π)	16.1414 ± 0.4427 mas[1]
Distance	202 ± 6 ly (62 ± 2 pc)
Absolute magnitude (MV)	−0.27[5]
Details
Mass	2.12[6] M☉
Radius	17.85+0.51 −0.53[7] R☉
Luminosity	126±8[7] L☉
Surface gravity (log g)	2.4[4] cgs
Temperature	4,576±50[7] K
Metallicity [Fe/H]	–0.14[4] dex
Rotational velocity (v sin i)	5.0[4] km/s
Age	1.11[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
SIMBAD	data

Nu Aurigae, Latinised from ν Aurigae, is the Bayer designation for a star in the northern constellation of Auriga. It is visible to the naked eye with an apparent visual magnitude of 3.96^[2] and is approximately 200 light-years (61 parsecs) distant from the Earth.^[1] This is an evolved giant star with a stellar classification of G9.5 III.^[9] It is a red clump star, which indicates that it is generating energy through the fusion of helium at its core.^[10] The outer envelope has expanded to 18 times the radius of the Sun and cooled to 4,576 K,^[7] giving it the characteristic yellow-hued glow of a G-type star.^[11] It shines with 126 times the luminosity of the Sun.^[7]

This is an astrometric binary with a suspected white dwarf companion.^[3] A 10th-magnitude star 54.6 arcseconds away is an optical companion.

See also

• NO Aurigae

References

1. Vallenari, 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 at VizieR.
2. Oja, 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. 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.
4. Massarotti, 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. Luck, 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. Baines, 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. Retrieved 2012-08-19.
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 from the original on December 3, 2013. Retrieved 2012-01-16.

External links

• HR 2012
• CCDM J05515+3909
• Image Nu Aurigae