10 Canum Venaticorum

From Wikipedia, the free encyclopedia
Jump to: navigation, search
10 Canum Venaticorum
Observation data
Epoch J2000      Equinox J2000
Constellation Canes Venatici
Right ascension 12h 44m 59.40506s[1]
Declination +39° 16′ 44.1061″[1]
Apparent magnitude (V) 5.95[2]
Spectral type G0 V[2]
U−B color index –0.03[3]
B−V color index +0.55[3]
Radial velocity (Rv) +80.3[4] km/s
Proper motion (μ) RA: –359.87[1] mas/yr
Dec.: +140.16[1] mas/yr
Parallax (π) 57.55 ± 0.32[1] mas
Distance 56.7 ± 0.3 ly
(17.38 ± 0.10 pc)
Absolute magnitude (MV) 4.76[5]
Mass 0.87+0.04
[6] M
Radius 0.96±0.16[7] R
Luminosity 1.055[5] L
Surface gravity (log g) 4.29[2] cgs
Temperature 5,789[2] K
Metallicity [Fe/H] –0.53[2] dex
Rotation 13 days[5]
Rotational velocity (v sin i) 8.11[8] km/s
Age 6.3[2] Gyr
Other designations
10 CVn, BD+40°2570, GJ 484, HD 110897, HIP 62207, HR 4845, SAO 63177.[9]
Database references

10 Canum Venaticorum is the Flamsteed designation for an ordinary star in the northern constellation of Canes Venatici. It has an apparent visual magnitude of 5.95,[2] which, according to the Bortle scale, can be seen with the naked eye from suburban locations. Based upon an annual parallax shift of 0.05755 arc seconds as measured by the Hipparcos satellite,[1] this system is 56.7 light-years (17.38 parsecs) from Earth.

The stellar classification of 10 Canum Venaticorum is G0 V,[2] indicating that it is a main sequence star that is fusing hydrogen into helium at its core to generate energy. It is older than the Sun, with an estimated age of six billion years.[2] The star has around 96%[7] of the Sun's radius and 87%[6] of the solar mass. It rotates about the axis an average of once every 13 days,[5] with a projected rotational velocity along the equator of 8 km/s.[8] The abundance of elements other than hydrogen and helium is lower than in the Sun.[2] The effective temperature of the stellar atmosphere is 5,789 K,[2] giving it the yellow hue of a G-type star.[10]

An excess of infrared emission at a wavelength of 70 μm suggests the presence of a debris disk.[11] The best fit disk model suggest a broad dust annulus with a peak brightness at a radius of 53.7 AU, that is inclined by an angle of 56° to the line of sight from the Earth along a position angle of 111.2°.[5]


  1. ^ a b c d e f van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. 
  2. ^ a b c d e f g h i j k Maldonado, J.; et al. (May 2012), "Metallicity of solar-type stars with debris discs and planets", Astronomy and Astrophysics, 541, arXiv:1202.5884Freely accessible, Bibcode:2012A&A...541A..40M, doi:10.1051/0004-6361/201218800. 
  3. ^ a b Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J. 
  4. ^ Nordström, B.; et al. (May 2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14,000 F and G dwarfs", Astronomy and Astrophysics, 418: 989–1019, arXiv:astro-ph/0405198Freely accessible, Bibcode:2004A&A...418..989N, doi:10.1051/0004-6361:20035959. 
  5. ^ a b c d e Marshall, J. P.; et al. (October 2014), "Interpreting the extended emission around three nearby debris disc host stars", Astronomy & Astrophysics, 570: 13, arXiv:1408.5649Freely accessible, Bibcode:2014A&A...570A.114M, doi:10.1051/0004-6361/201424517, A114. 
  6. ^ a b Ramírez, I.; et al. (September 2012). "Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets". The Astrophysical Journal. 756 (1): 46. arXiv:1207.0499Freely accessible. Bibcode:2012ApJ...756...46R. doi:10.1088/0004-637X/756/1/46. 
  7. ^ a b Perrin, M.-N. (1987), "Stellar radius determination from IRAS 12-micron fluxes", Astronomy and Astrophysics, 172: 235–240, Bibcode:1987A&A...172..235P. 
  8. ^ a b Martínez-Arnáiz, R.; et al. (September 2010), "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter", Astronomy and Astrophysics, 520: A79, arXiv:1002.4391Freely accessible, Bibcode:2010A&A...520A..79M, doi:10.1051/0004-6361/200913725. 
  9. ^ "10 CVn -- High proper-motion Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2014-01-26. 
  10. ^ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on March 10, 2012, retrieved 2012-01-16. 
  11. ^ Trilling, D. E.; et al. (February 2008), "Debris Disks around Sun-like Stars", The Astrophysical Journal, 674 (2): 1086–1105, arXiv:0710.5498Freely accessible, Bibcode:2008ApJ...674.1086T, doi:10.1086/525514.