6 Canum Venaticorum

Star in the constellation Canes Venatici

6 Canum Venaticorum  Observation data
Epoch J2000 Equinox J2000

Constellation | Canes Venatici
Right ascension | 12h 25m 50.93786s[1]
Declination | +39° 01′ 07.0195″[1]
Apparent magnitude (V) | +5.01[2]
Characteristics
Evolutionary stage | horizontal branch[3]
Spectral type | G9 III[4]
B−V color index | 0.94[2]
Astrometry
Radial velocity (Rv)| −4.17±0.33[5] km/s
Proper motion (μ)|  RA: −77.335[1] mas/yr
Dec.: −33.782[1] mas/yr
Parallax (π)| 13.2764 ± 0.2086 mas[1]
Distance| 246 ± 4 ly
(75 ± 1 pc)
Absolute magnitude (MV)| 0.65±0.044[6]
Details
Mass| 2.04[2] M☉
Radius| 9[5] R☉
Luminosity| 67.6[2] L☉
Surface gravity (log g)| 2.8[5] cgs
Temperature| 4,938±21[2] K
Metallicity [Fe/H]| −0.11[5] dex
Rotational velocity (v sin i)| 0.0[5] km/s
Age| 2.05[2] Gyr
Other designations

6 CVn, BD+39° 2521, FK5 461, HD 108225, HIP 60646, HR 4728, SAO 63000[7]

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

[edit]

1. ^ 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.
2. ^ 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.
3. ^ 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.
4. ^ 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.
5. ^ 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.
6. ^ 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.
7. ^ "6 CVn". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-25.
8. ^ 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.
9. ^ 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.

* v
* t
* e

Constellation of Canes Venatici

* Canes Venatici in Chinese astronomy
* Giant Void
* List of stars in Canes Venatici

Stars|

| Bayer|

* α1
* α2 (Cor Caroli)
* β (Chara)

|

Flamsteed|

* 4
* 5
* 6
* 10
* 19
* 20
* 21
* 24
* 25

Variable|

* R
* Y (La Superba)
* RS
* AM
* AW
* BH
* DG

HR|

* 4997

Other|

* Gliese 521
* HAT-P-12
* HAT-P-36 (Tuiren)
* CWISE J1249+3621

| Exoplanets|

* HAT-P-12b

|

| Star clusters|

* Messier 3

|

Galaxies|

| Messier|

* 51
* a (Whirlpool Galaxy)
* b
* 63
* 94
* 106

|

NGC|

* 4111
* 4138
* 4145
* 4151
* 4163
* 4183
* 4214
* 4217
* 4242
* 4244
* 4395
* 4399
* 4400
* 4401
* 4449
* 4485
* 4490
* 4534
* 4618
* 4625
* 4627
* 4631
* 4656
* 4657
* 4707
* 4800
* 4861
* 5002
* 5003
* 5005
* 5023
* 5033
* 5112
* 5223
* 5229
* 5238
* 5273
* 5371
* 5394

Numbered|

* I
* II

Other|

* 3C 285
* 3C 286
* 3C 288
* DDO 169
* IC 883
* IC 4182
* IC 4271
* I Zwicky 36
* KKR 03
* 4C +41.26
* TON 618

| Galaxy clusters|

* Canes II Group
* M51 Group
* M94 Group
* NGC 4631 Group

|

| Astronomical events|

* GRB 090429B
* SN 1994I
* SN 2005cs
* SN 2008ax

|

Category
*[RA:]: Right Ascension
*[Dec.:]: Declination
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