Omega Capricorni

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Template:Short description

Omega Capricorni
Template:Location mark
Location of ω Capricorni (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Capricornus
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) +4.11[2]
Characteristics
Spectral type K4 III[3]
U−B Template:Engvar +1.93[2]
B−V Template:Engvar +1.64[2]
Variable type Suspected[4]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[5] km/s
Proper motion (μ) RA: −9.261[1] mas/yr
Dec.: −1.598[1] mas/yr
Parallax (π)3.1381±0.3711 mas[1]
Distanceapprox. Template:Rnd ly
(approx. Template:Rnd pc)
Absolute magnitude (MV)−2.7[6]
Details
MassScript error: No such module "val".[7] Template:Solar mass
RadiusScript error: No such module "val".[1] Template:Solar radius
LuminosityScript error: No such module "val".[1] Template:Solar luminosity
Surface gravity (log g)0.85[8] cgs
TemperatureScript error: No such module "val".[1] K
Metallicity [Fe/H]−0.24[9] dex
Rotational velocity (v sin i)4.68[8] km/s
AgeScript error: No such module "val".[7] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[10]
Database references
SIMBADdata

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Omega Capricorni, which is Latinized from ω Capricorni, is a star in the southern constellation Capricornus, near the southern constellation border with Microscopium. It is an orange hued star that is faintly visible to the naked eye, having an apparent visual magnitude of +4.11.[2] Based upon an annual parallax shift of Script error: No such module "val". as seen from the Earth,[1] it is located approximately 1,000 light years from the Sun. It is a candidate member of the Ursa Major Moving Group[11] and has a relatively high peculiar velocity of Script error: No such module "val"., making it is a possible runaway star.[7]

In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Celestial Farmland, refers to an asterism consisting of ω Capricorni, 3 Piscis Austrini, 24 Capricorni and ψ Capricorni.[12] Consequently, the Chinese name for ω Capricorni itself is Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx.)[13]

This is an evolved K-type giant star with a stellar classification of K4 III,[3] and is a suspected variable.[4] With the supply of hydrogen at its core exhausted, the star has expanded to about 172[1] times the radius of the Sun. It is 48[7] million years old with 7 times the mass of the Sun.[7] Omega Capricorni is radiating 6,300[1] times the luminosity of the Sun from its bloated photosphere at an effective temperature of 3,915 K.[1] It is a barium star,[6] showing an overabundance of the s-process elements. This suggests that Omega Capricorni has an orbiting white dwarf companion.[14]

References

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  1. ↑ a b c d e f g h i j k l Template:Cite DR2
  2. ↑ a b c d Script error: No such module "citation/CS1".
  3. ↑ a b Script error: No such module "citation/CS1".
  4. ↑ a b Script error: No such module "citation/CS1".
  5. ↑ Script error: No such module "citation/CS1".
  6. ↑ a b Script error: No such module "citation/CS1".
  7. ↑ a b c d e Script error: No such module "citation/CS1".
  8. ↑ a b Script error: No such module "citation/CS1".
  9. ↑ Script error: No such module "citation/CS1".
  10. ↑ Template:Cite simbad
  11. ↑ Script error: No such module "citation/CS1". See table 7.
  12. ↑ Template:In lang 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, Template:ISBN.
  13. ↑ Template:In lang AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 3 日 Template:Webarchive
  14. ↑ Script error: No such module "citation/CS1".

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Template:Stars of Capricornus

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