Kappa Arietis

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Template:Short description

Kappa Arietis
Template:Location mark
Location of κ Arietis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Aries[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 5.02[3]
Characteristics
Spectral type A2m[1]
U−B Template:Engvar +0.11[3]
B−V Template:Engvar +0.12[3]
Astrometry
Radial velocity (Rv)+11.5[4] km/s
Proper motion (μ) RA: +20.348[2] mas/yr
Dec.: −35.671[2] mas/yr
Parallax (π)18.0292±0.3092 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)1.30[1]
Orbit[5]
Period (P)15.2938 d
Eccentricity (e)0.61
Periastron epoch (T)Script error: No such module "val".
Argument of periastron (ω)
(secondary)		358.3°
Semi-amplitude (K1)
(primary)		34.5 km/s
Semi-amplitude (K2)
(secondary)		35.4 km/s
Details
Mass2.09±0.31[6] Template:Solar mass
Radius2.32±0.08[6] Template:Solar radius
Luminosity24.4±1.3[6] Template:Solar luminosity
Surface gravity (log g)4.03±0.07[6] cgs
Temperature8,421±125[6] K
Metallicity [Fe/H]+0.18[7] dex
Rotational velocity (v sin i)18[8] km/s
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[9]
Database references
SIMBADdata

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Kappa Arietis is a binary star system in the northern constellation of Aries. Its name is a Bayer designation that is Latinized from κ Arietis, and abbreviated Kappa Ari or κ Ari. The combined apparent visual magnitude of the pair is 5.02,[3] making the system bright enough for it to be dimly visible to the naked eye as a white-hued point of light. It is located approximately 181 light-years from the Sun based on parallax,[2] and is drifting further away with a radial velocity of +11.5 km/s.[4]

The binary nature of this system was announced in 1918 by Lick Observatory. It is a double-lined spectroscopic binary with an orbital period of 15.3 days and an eccentricity of 0.61.[5] Both components displaying the spectral properties of an Am, or metallic-lined star. They have nearly the same brightness and their mass ratio is 1.03; very close to equal.[7]

References

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  1. ↑ a b c Template:Cite XHIP
  2. ↑ a b c d e f Template:Cite DR2
  3. ↑ a b c d Script error: No such module "citation/CS1".
  4. ↑ a b Script error: No such module "citation/CS1".
  5. ↑ a b Script error: No such module "citation/CS1".
  6. ↑ a b c d e Script error: No such module "citation/CS1".
  7. ↑ a b Script error: No such module "citation/CS1".
  8. ↑ Script error: No such module "citation/CS1".
  9. ↑ Template:Cite simbad

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External links

Template:Stars of Aries

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