Astronomy:Nu1 Columbae
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Columba[1] |
| Right ascension | 05h 37m 16.5030s[2] |
| Declination | −27° 52′ 17.235″[2] |
| Apparent magnitude (V) | 6.14[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4] |
| Spectral type | F0 IV[5] |
| B−V color index | +0.34[3] |
| Astrometry | |
| Radial velocity (Rv) | 26.7±2.0[6] km/s |
| Proper motion (μ) | RA: −3.738[2] mas/yr Dec.: −32.790[2] mas/yr |
| Parallax (π) | 23.0790 ± 0.1619[2] mas |
| Distance | 141.3 ± 1.0 ly (43.3 ± 0.3 pc) |
| Absolute magnitude (MV) | +3.18[1] |
| Details | |
| Mass | 1.41[7] M☉ |
| Radius | 1.57[8] R☉ |
| Luminosity | 5.4[8] L☉ |
| Surface gravity (log g) | 4.01±0.14[7] cgs |
| Temperature | 7,079±241[7] K |
| Metallicity [Fe/H] | −0.22[6] dex |
| Rotational velocity (v sin i) | 161[9] km/s |
| Age | 641[7] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Nu1 Columbae is a star in the southern constellation of Columba. Its name is a Bayer designation that is Latinized from ν1 Columbae, and abbreviated Nu1 Col or ν1 Col. This star is visible to the naked eye, having an apparent visual magnitude of 6.14.[3] According to the Bortle scale, stars with this magnitude are faintly visible from dark rural skies. Based upon an annual parallax shift of 23.08 mas,[2] this star is about 128 light years distant from the Sun.
This star has a stellar classification of F0 IV,[9] suggesting it is an evolving F-type subgiant star. However, models indicate that it is a main sequence star with an estimated age of 641 million years and a mass 1.41 times that of the Sun.[7] The star is spinning relatively rapidly, with a projected rotational velocity of 161 km/s.[9] It is radiating around 5.4 times the solar luminosity[8] from its outer atmosphere at an effective temperature of 7,079 K.[7]
There is a faint star 2.6″ away with a similar parallax,[11] but it is not mentioned in any of the standard catalogues of multiple stars.
References
- ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 Nicolet, B. (1975), "Catalogue of Measurements in the Cape UBV Photometry on Magnetic Tape", Astronomy and Astrophysics Supplement Series 22: 239, Bibcode: 1975A&AS...22..239N.
- ↑ Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. Bibcode: 2012A&A...537A.120Z.
- ↑ Houk, N. (1982), Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0, Bibcode: 1982mcts.book.....H.
- ↑ 6.0 6.1 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.
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 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.
- ↑ 8.0 8.1 8.2 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ 9.0 9.1 9.2 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.
- ↑ "nu.01 Col". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=nu.01+Col.
- ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
 |  |
