Summary
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.
| 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] |
| Distance | 128 ± 5 ly (39 ± 2 pc) |
| Absolute magnitude (MV) | +3.18[5] |
| Details | |
| Mass | 1.41[6] M☉ |
| Luminosity | 4.3[7] L☉ |
| Surface gravity (log g) | 4.01±0.14[6] cgs |
| Temperature | 7,079±241[6] K |
| Metallicity [Fe/H] | −0.22[4] dex |
| Rotational velocity (v sin i) | 161[3] km/s |
| Age | 641[6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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 edit
- ^ a b c d e f 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.
- ^ a b c 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.
- ^ a b c d 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.
- ^ a b 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.
- ^ 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 e f 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.
- ^ a b 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.
- ^ "nu.01 Col -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2016-12-29.