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5 Canum Venaticorum

5 Canum Venaticorum
Observation data
Epoch J2000      Equinox J2000
Constellation Canes Venatici
Right ascension 12h 24m 01.49461s[1]
Declination +51° 33′ 44.1151″[1]
Apparent magnitude (V) +4.767[2]
Characteristics
Evolutionary stage giant
Spectral type G7 III Ba0.3[3]
B−V color index 0.868[2]
Astrometry
Radial velocity (Rv)−13.9[2] km/s
Proper motion (μ) RA: +12.769[1] mas/yr
Dec.: +11.904[1] mas/yr
Parallax (π)8.6983 ± 0.1637 mas[1]
Distance375 ± 7 ly
(115 ± 2 pc)
Absolute magnitude (MV)−0.68[4]
Details
Mass2.96[2] M☉
Radius12[5] R☉
Luminosity174[2] L☉
Surface gravity (log g)2.60[4] cgs
Temperature5,098±75[2] K
Metallicity [Fe/H]+0.01[4] dex
Rotational velocity (v sin i)6.6[6] km/s
Age530[2] Myr
Other designations
5 CVn, BD+52° 1626, FK5 2994, GC 16906, HD 107950, HIP 60485, HR 4716, SAO 28366[7]
Database references
SIMBADdata

5 Canum Venaticorum is a probable binary star[8] system in the northern constellation of Canes Venatici, located about 375 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 +4.77.[2] The system is moving closer to the Earth with a heliocentric radial velocity of −14 km/s.[2]

The visible component is an evolved G-type giant star with a stellar classification of G7 III Ba0.3.[3] The 'Ba0.3' suffix notation indicates this is a mild barium star, which means that the stellar atmosphere has been enhanced by s-process elements most likely provided by what is now an orbiting white dwarf companion.[8] The primary is 530[2] million years old with 2.96[2] times the mass of the Sun and has expanded to about 12[5] times the Sun's radius. It is radiating 174[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,098 K.[2]

In Chinese astronomy, 5 Canum Venaticorum is called 相, Pinyin: Xiāng, meaning Prime Minister, because this star is marking itself and stand alone in Prime Minister asterism, Purple Forbidden enclosure mansion (see : Chinese constellation).[9]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i j k l m Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Takeda2008 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Fracassini2001 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference DeMedeiros2000 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference ridpathcanven was invoked but never defined (see the help page).

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