Chi Andromedae

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χ Andromedae
Template:Location mark
Location of χ Andromedae (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Andromeda
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) +5.01[2]
Characteristics
Spectral type G8 III[2]
U−B Template:Engvar +0.55[3]
B−V Template:Engvar +0.883[4]
Astrometry
Radial velocity (Rv)+6.54[5] km/s
Proper motion (μ) RA: Script error: No such module "val".[1] mas/yr
Dec.: Script error: No such module "val".[1] mas/yr
Parallax (π)12.3592±0.1046 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+0.59[2]
Orbit[6]
Period (P)20.8 ± 0.1 yr
Eccentricity (e)0.368 ± 0.020
Periastron epoch (T)43,216 ± 60 MJD
Argument of periastron (ω)
(secondary)		144 ± 3°
Semi-amplitude (K1)
(primary)		3.01 ± 0.09 km/s
Details
Radius9[5] Template:Solar radius
Luminosity47[5] Template:Solar luminosity
Surface gravity (log g)2.9[5] cgs
Temperature5,070[5] K
Metallicity [Fe/H]–0.21[5] dex
Rotational velocity (v sin i)0.0[5] km/s
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
52 Andromedae, BD+43°343, FK5 2112, HD 10072, HIP 7719, HR 469, SAO 37406, PPM 44275[7]
Database references
SIMBADdata

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File:Chi Andromedae.jpg
Script error: No such module "Lang". Andromedae in optical light

Chi Andromedae (Script error: No such module "Lang". Andromedae, Script error: No such module "Lang". And) is the Bayer designation for a star in the northern constellation of Andromeda. It has an apparent visual magnitude of +5.01,[2] which is relatively faint for a naked-eye star. Based upon parallax measurements made during the Gaia mission, Chi Andromedae is located around Script error: No such module "convert". from Earth.[1]

χ Andromedae is a member of Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Heaven's Great General, together with γ Andromedae, φ Persei, 51 Andromedae, 49 Andromedae, θ Andromedae, τ Andromedae, 56 Andromedae, β Trianguli, γ Trianguli and δ Trianguli. Consequently, the Chinese name for χ Andromedae itself is Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx.)[8]

This is most likely a spectroscopic binary system with an estimated orbital period of 20.8 years and an eccentricity of 0.37. The primary component has a stellar classification of G8 III,[6] which indicates it is a giant star that has exhausted the supply of hydrogen at its core and evolved away from the main sequence. The outer envelope has expanded to about nine times the radius of the Sun and it is radiating 47[5] times the luminosity of the Sun at an effective temperature of 5,070 K.[5] This heat gives the star the yellow-hued glow of a G-type star.[9] It appears to be rotating very slowly with no measurable projected rotational velocity.[5] The secondary component seems to be a main-sequence star of the spectral class G or K.[6]

References

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  1. ↑ a b c d e f Template:Cite Gaia EDR3
  2. ↑ a b c d Script error: No such module "citation/CS1".
  3. ↑ Script error: No such module "citation/CS1".
  4. ↑ Script error: No such module "citation/CS1".
  5. ↑ a b c d e f g h i j Script error: No such module "citation/CS1".
  6. ↑ a b c Script error: No such module "citation/CS1".
  7. ↑ Template:Cite simbad
  8. ↑ Template:In lang AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 10 日 Script error: No such module "webarchive".
  9. ↑ Script error: No such module "citation/CS1".

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External links

Template:Stars of Andromeda

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