PROFILBARU.COM

6 Canum Venaticorum
Observation data; Epoch J2000 Equinox J2000
Constellation	Canes Venatici
Right ascension	12h 25m 50.93786s
Declination	+39° 01′ 07.0195″
Apparent magnitude (V)	+5.01
Characteristics
Evolutionary stage	horizontal branch
Spectral type	G9 III
B−V color index	0.94
Astrometry
Radial velocity (Rv)	−4.17±0.33 km/s
Proper motion (μ)	RA: −77.335 mas/yr ; Dec.: −33.782 mas/yr
Parallax (π)	13.2764 ± 0.2086 mas
Distance	246 ± 4 ly ; (75 ± 1 pc)
Absolute magnitude (MV)	0.65±0.044
Details
Mass	2.04 M☉
Radius	9 R☉
Luminosity	67.6 L☉
Surface gravity (log g)	2.8 cgs
Temperature	4,938±21 K
Metallicity [Fe/H]	−0.11 dex
Rotational velocity (v sin i)	0.0 km/s
Age	2.05 Gyr
Other designations
	6 CVn, BD+39° 2521, FK5 461, HD 108225, HIP 60646, HR 4728, SAO 63000
Database references
SIMBAD	data

6 Canum Venaticorum is a single^[8] star in the northern constellation Canes Venatici, located 246 light years from the Sun.^[1] It is visible to the naked eye as a faint yellow-hued star with an apparent visual magnitude of +5.01.^[2] The star is moving closer to the Earth with a heliocentric radial velocity of −4.2 km/s.^[5]

This is an evolved G-type giant star with a stellar classification of G9 III,^[4] which means it has exhausted the hydrogen supply at its core and expanded. It is a red clump giant, indicating that it is on the horizontal branch and is generating energy through the helium fusion at its core.^[3] Data from the Hipparcos mission provided evidence of microvariability with an amplitude of 0.0056 in magnitude and a frequency of 0.00636 per day, or one cycle every 157 days.^[9]

6 Canum Venaticorum is about two^[2] billion years old with double^[2] the mass of the Sun. It has expanded to 9^[5] times the Sun's radius and is radiating 68^[2] times the Sun's luminosity from its photosphere at an effective temperature of 4,938 K.^[2]

References

^ ^a ^b ^c ^d ^e ^f 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 ^f ^g ^h ⁱ ^j ^k Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", Astronomical Journal, 150 (3), 88, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID 118505114.
^ ^a ^b Alves, David R. (August 2000), "K-Band Calibration of the Red Clump Luminosity", The Astrophysical Journal, 539 (2): 732–741, arXiv:astro-ph/0003329, Bibcode:2000ApJ...539..732A, doi:10.1086/309278, S2CID 16673121.
^ ^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 ^c ^d ^e ^f ^g Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity", The Astronomical Journal, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209, S2CID 121883397.
^ Park, Sunkyung; et al. (2013), "Wilson-Bappu Effect: Extended to Surface Gravity", The Astronomical Journal, 146 (4): 73, arXiv:1307.0592, Bibcode:2013AJ....146...73P, doi:10.1088/0004-6256/146/4/73, S2CID 119187733.
^ "6 CVn". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-25.
^ Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
^ Koen, Chris; Eyer, Laurent (2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society, 331 (1): 45, arXiv:astro-ph/0112194, Bibcode:2002MNRAS.331...45K, doi:10.1046/j.1365-8711.2002.05150.x.