Star in the constellation Auriga
φ Aurigae in optical light Phi Aurigae ,Latinized from φ Aurigae, is agiant star in the northernconstellation ofAuriga . It is faintly visible to the naked eye with anapparent visual magnitude of 5.089.[ 2] It lies 10′ from another faint naked-eye starHD 35520 , between the threeopen clusters M36 andM38 , andNGC 1893 .
The distance to this star, as determined fromparallax measurements, is approximately 480light-years (150parsecs ) with a 10 light-yearmargin of error .[ 9] This is anevolved giant star with astellar classification of K3 IIIp[ 3] and an estimated radius equal to 34 times the radius of the Sun. Theouter envelope has aneffective temperature of 4,222 K,[ 6] giving it the cool orange-hued glow of aK-type star .
^a b c d e Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018)."Gaia Data Release 2: Summary of the contents and survey properties" .Astronomy & Astrophysics .616 . A1.arXiv :1804.09365 .Bibcode :2018A&A...616A...1G .doi :10.1051/0004-6361/201833051 . Gaia DR2 record for this source atVizieR .^a b c d Jennens, P. A.; Helfer, H. L. (September 1975), "A new photometric metal abundance and luminosity calibration for field G and K giants.",Monthly Notices of the Royal Astronomical Society ,172 (3):667– 679,Bibcode :1975MNRAS.172..667J ,doi :10.1093/mnras/172.3.667 . ^a b c d Cenarro, A. J.; et al. (January 2007), "Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters",Monthly Notices of the Royal Astronomical Society ,374 (2):664– 690,arXiv :astro-ph/0611618 ,Bibcode :2007MNRAS.374..664C ,doi :10.1111/j.1365-2966.2006.11196.x ,S2CID 119428437 . ^ Famaey, B.; et al. (January 2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters",Astronomy and Astrophysics ,430 (1):165– 186,arXiv :astro-ph/0409579 ,Bibcode :2005A&A...430..165F ,doi :10.1051/0004-6361:20041272 ,S2CID 17804304 . ^ 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 . ^a b c d van Belle, Gerard T.; von Braun, Kaspar; Ciardi, David R.; Pilyavsky, Genady; Buckingham, Ryan S.; Boden, Andrew F.; Clark, Catherine A.; Hartman, Zachary; van Belle, Gerald; Bucknew, William; Cole, Gary (2021-12-01)."Direct Measurements of Giant Star Effective Temperatures and Linear Radii: Calibration against Spectral Types and V - K Color" .The Astrophysical Journal .922 (2): 163.arXiv :2107.09205 .Bibcode :2021ApJ...922..163V .doi :10.3847/1538-4357/ac1687 .ISSN 0004-637X . Phi Aurigae's database entry atVizieR .^ De Medeiros, J. R.; et al. (November 2000), "Rotation and lithium in single giant stars",Astronomy and Astrophysics ,363 :239– 243,arXiv :astro-ph/0010273 ,Bibcode :2000A&A...363..239D . ^ "* phi Aur" .SIMBAD .Centre de données astronomiques de Strasbourg . Retrieved2012-08-23 .^ van Leeuwen, Floor (November 2007), "Validation of the new Hipparcos reduction",Astronomy and Astrophysics ,474 (2):653– 664,arXiv :0708.1752v1 ,Bibcode :2007A&A...474..653V ,doi :10.1051/0004-6361:20078357 ,S2CID 18759600 . Note: see VizieR catalogueI/311 .