25 Canum Venaticorum

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Template:Short description

25 Canum Venaticorum
Observation data
Epoch J2000      Equinox J2000
Constellation Canes Venatici
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) +4.82[2] (4.98 + 6.95)[3]
Characteristics
Spectral type A7 III + A8 V:[4]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[2] km/s
Proper motion (μ) RA: −95.54[1] mas/yr
Dec.: +23.75[1] mas/yr
Parallax (π)16.42±0.53 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)0.90[2]
Orbit[5]
Period (P)228 yr
Semi-major axis (a)1.02″
Eccentricity (e)0.80
Inclination (i)147°
Longitude of the node (Ω)87°
Periastron epoch (T)1864.0
Argument of periastron (ω)
(secondary)		159°
Details
25 CVn A
Mass2.23[6] Template:Solar mass
Surface gravity (log g)3.85[7] cgs
TemperatureScript error: No such module "val".[7] K
Rotational velocity (v sin i)235[8] km/s
Age659[7] Myr
25 CVn B
Mass1.58[6] Template:Solar mass
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[9]
Database references
SIMBADdata

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25 Canum Venaticorum is a binary star[10] system in the northern constellation of Canes Venatici, approximately 199[1] light years from the Sun. It is visible to the naked eye as a faint, white-hued star with a combined apparent visual magnitude of +4.82[2] The system is moving closer to the Earth with a heliocentric radial velocity of roughly −10 km/s.[2]

This is a wide binary system with an orbital period of 228 years and an eccentricity of 0.80.[5] As of 2001, they had a projected separation of Script error: No such module "val"..[6] The magnitude 4.98[3] primary, component A, has a stellar classification of A7 III,[4] which matches an A-type giant star. It is 659[7] million years old with a projected rotational velocity of 235 km/s. This rate of spin is giving the star an oblate shape with an equatorial bulge that is an estimated 27% larger than the polar radius.[8] The companion, component B, is a magnitude 6.95[3] A-type main-sequence star with a class of A8 V:.[4] The ':' suffix indicates some uncertainty in the classification of this star.

References

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  1. ↑ a b c d e f Script error: No such module "citation/CS1".
  2. ↑ a b c d e Script error: No such module "Citation/CS1".
  3. ↑ a b c Script error: No such module "citation/CS1".
  4. ↑ a b c Script error: No such module "citation/CS1".
  5. ↑ a b Script error: No such module "citation/CS1".
  6. ↑ a b c Script error: No such module "citation/CS1".
  7. ↑ a b c d Script error: No such module "citation/CS1".
  8. ↑ a b Script error: No such module "citation/CS1".
  9. ↑ Template:Cite simbad
  10. ↑ Script error: No such module "citation/CS1".

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Template:Stars of Canes Venatici

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