Astronomy:Nu1 Columbae
| Observation data 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[1] mas |
| 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 |
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.
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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 2.2 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.
- ↑ 3.0 3.1 3.2 3.3 Royer, F. et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics 463 (2): 671–682, doi:10.1051/0004-6361:20065224, Bibcode: 2007A&A...463..671R.
- ↑ 4.0 4.1 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, doi:10.1051/0004-6361/201016276, Bibcode: 2011A&A...530A.138C.
- ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 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, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
- ↑ 7.0 7.1 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M.
- ↑ "nu.01 Col -- Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=nu1+Col, retrieved 2016-12-29.
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