6 Canis Minoris is a star in the equatorial constellation of Canis Minor, located around 570 light years away from the Sun. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of +4.55.[2] This object is moving closer to the Earth with a heliocentric radial velocity of −16.3 km/s.[4] Kinematically, it is a member of an outlying group belonging to the Ursa Major flow of the Sirius supercluster.[9]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Canis Minor |
| Right ascension | 07h 29m 47.78172s[1] |
| Declination | +12° 00′ 23.6347″[1] |
| Apparent magnitude (V) | +4.55[2] |
| Characteristics | |
| Evolutionary stage | giant |
| Spectral type | K1 III[3] |
| B−V color index | 1.276±0.001[2] |
| Astrometry | |
| Radial velocity (Rv) | −16.31±0.13[4] km/s |
| Proper motion (μ) | RA: −0.57[1] mas/yr Dec.: −18.85[1] mas/yr |
| Parallax (π) | 5.70 ± 0.21 mas[1] |
| Distance | 570 ± 20 ly (175 ± 6 pc) |
| Absolute magnitude (MV) | −1.67[2] |
| Details | |
| Mass | 4.0[5] M☉ |
| Radius | 44[6] R☉ |
| Luminosity | 761.44[2] L☉ |
| Temperature | 4,370[5] K |
| Metallicity [Fe/H] | 0.02[5] dex |
| Rotational velocity (v sin i) | 1.7[7] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an evolved giant star with a stellar classification of K1 III.[3] It has a mild barium anomaly,[10] which may indicate this is a binary star system with a white dwarf companion.[11] The interferometry-measured angular diameter of the visible component is about 2.31±0.03 mas,[12] which, at its estimated distance, equates to a physical radius of about 44 times the radius of the Sun.[6] This star has four[5] times the mass of the Sun and is radiating 761[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,370 K.[5]
References
edit- ^ a b c d e 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 d e f 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 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
- ^ a b Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d e Gondoin, P. (December 1999), "Evolution of X-ray activity and rotation on G-K giants", Astronomy and Astrophysics, 352: 217–227, Bibcode:1999A&A...352..217G.
- ^ a b Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, vol. 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1. The radius (R*) is given by:
- ^ De Medeiros, J. R.; et al. (November 2000), "Rotation and lithium in single giant stars", Astronomy and Astrophysics, 363: 239–243, arXiv:astro-ph/0010273, Bibcode:2000A&A...363..239D.
- ^ "6 CMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-04-02.
- ^ Chupina, N. V.; et al. (June 2006), "Kinematic structure of the corona of the Ursa Major flow found using proper motions and radial velocities of single stars", Astronomy and Astrophysics, 451 (3): 909–916, Bibcode:2006A&A...451..909C, doi:10.1051/0004-6361:20054009.
- ^ Escorza, A.; et al. (December 2017), "Hertzsprung-Russell diagram and mass distribution of barium stars", Astronomy & Astrophysics, 608: 13, arXiv:1710.02029, Bibcode:2017A&A...608A.100E, doi:10.1051/0004-6361/201731832, S2CID 119428276, A100.
- ^ 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ Richichi, A.; et al. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039
