Astronomy:Nu1 Canis Majoris
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Short description: Binary star system in the constellation Canis Major
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 06h 36m 22.85133s[1] |
| Declination | −18° 39′ 35.6838″[1] |
| Apparent magnitude (V) | 5.704[2] (5.87 + 7.61)[3] |
| Characteristics | |
| Spectral type | G8 III + F3 IV-V[3] |
| B−V color index | +0.815[2] |
| Astrometry | |
| Radial velocity (Rv) | +26.13[2] km/s |
| Proper motion (μ) | RA: −10.09[1] mas/yr Dec.: +13.06[1] mas/yr |
| Parallax (π) | 12.3660 ± 0.1985[4] mas |
| Distance | 264 ± 4 ly (81 ± 1 pc) |
| Absolute magnitude (MV) | +1.23[5] |
| Details | |
| ν1 CMa A | |
| Mass | 1.41[2] M☉ |
| Luminosity | 8[2] L☉ |
| Surface gravity (log g) | 3.00[6] cgs |
| Temperature | 6,091±822[2] K |
| Metallicity [Fe/H] | −0.06[6] dex |
| Rotational velocity (v sin i) | 4.8±0.2[5] km/s |
| Age | 3.07[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Nu1 Canis Majoris (ν1 Canis Majoris) is a binary star in the constellation Canis Major. It is visible to the naked eye with a combined apparent visual magnitude of 5.7.[2] Based on parallax shift of 12.366 mas as seen from our orbit, this system is approximately 264 light years from the Sun.
As of 2011, the pair had an angular separation of 17.29 arc seconds along a position angle of 264.2°.[8] The yellow hued magnitude 5.87[3] primary, component A, is an evolved G-type giant star with a stellar classification of G8 III.[3] Its magnitude 7.61[3] companion, component B, is a yellow-white hued F-type main sequence/subgiant hybrid with a class of F3 IV-V.[3]
References
- ↑ 1.0 1.1 1.2 1.3 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 2.3 2.4 2.5 2.6 2.7 Luck, R. Earle (September 2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal 150 (3): 23, doi:10.1088/0004-6256/150/3/88, 88, Bibcode: 2015AJ....150...88L.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 5.0 5.1 Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics 542: A116, doi:10.1051/0004-6361/201118724, Bibcode: 2012A&A...542A.116A.
- ↑ 6.0 6.1 Soubiran, C. et al. (2008), "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants", Astronomy and Astrophysics 480 (1): 91–101, doi:10.1051/0004-6361:20078788, Bibcode: 2008A&A...480...91S.
- ↑ "nu01 CMa". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=nu01+CMa.
- ↑ Mason, Brian D. et al. (May 2012), "Speckle Interferometry at the U.S. Naval Observatory. XVIII", The Astronomical Journal 143 (5): 6, doi:10.1088/0004-6256/143/5/124, 124, Bibcode: 2012AJ....143..124M, http://www.dtic.mil/get-tr-doc/pdf?AD=ADA561759.
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