Nu1 Columbae

Nu1 Columbae, Latinized from ν1 Columbae, is a star in the southern constellation of Columba. It is visible to the naked eye, having an apparent visual magnitude of 6.14.[2] According to the Bortle scale, stars with this magnitude are faintly visible from dark rural skies. Based upon an annual parallax shift of 25.40 mas,[1] this star is about 128 light years distant from the Sun.

For other stars with this Bayer designation, see ν Columbae.
ν1 Columbae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Columba
Right ascension 05h 37m 16.50521s[1]
Declination −27° 52′ 16.8288″[1]
Apparent magnitude (V) 6.14[2]
Characteristics
Spectral type F0 IV[3]
B−V color index +0.34[2]
Astrometry
Radial velocity (Rv)26.7±2.0[4] km/s
Proper motion (μ) RA: +18.24[1] mas/yr
Dec.: −57.61[1] mas/yr
Parallax (π)25.40 ± 1.07 mas[1]
Distance128 ± 5 ly
(39 ± 2 pc)
Absolute magnitude (MV)+3.18[5]
Details
Mass1.41[6] M☉
Luminosity4.3[7] L☉
Surface gravity (log g)4.01±0.14[6] cgs
Temperature7,079±241[6] K
Metallicity [Fe/H]−0.22[4] dex
Rotational velocity (v sin i)161[3] km/s
Age641[6] Myr
Other designations
ν1 Col, CD−27° 2389, HD 37430, HIP 26412, HR 1926, SAO 170601.[8]
Database references
SIMBADdata

This star has a stellar classification of F0 IV,[3] which indicates it is an evolving F-type subgiant star. It is an estimated 6410 million years of age, with a mass 1.41 times that of the Sun.[6] The star is spinning relatively rapidly, with a projected rotational velocity of 161 km/s.[3] It is radiating around 4.3[7] times the solar luminosity from its outer atmosphere at an effective temperature of 7,079 K.[6]

References
  1. van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
  2. Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa, 27: 11, Bibcode:1968MNSSA..27...11C.
  3. Royer, F.; et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224, S2CID 18475298.
  4. Casagrande, L.; et al. (2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy & Astrophysics, 530 (A138): 21, arXiv:1103.4651, Bibcode:2011A&A...530A.138C, doi:10.1051/0004-6361/201016276, S2CID 56118016.
  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. David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
  7. McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
  8. "nu.01 Col -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2016-12-29.
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