Chi Capricorni
Template:Location mark Location of χ 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) | +5.28[2] |
| Characteristics | |
| Spectral type | A0 V[3] |
| B−V Template:Engvar | +0.01[2] |
| Astrometry | |
| Proper motion (μ) | RA: +19.83[1] mas/yr Dec.: −60.15[1] mas/yr |
| Parallax (π) | 18.14±0.31 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | +1.59[4] |
| Details[5] | |
| Mass | 2.78 Template:Solar mass |
| Luminosity | 21[6] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val". cgs |
| Temperature | Script error: No such module "val". K |
| Metallicity [Fe/H] | Script error: No such module "val".[7] dex |
| Rotational velocity (v sin i) | 212[3] km/s |
| Age | 251 Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| χ Cap, 25 Cap, BD−21°5933, FK5 3690, HD 201184, HIP 104365, HR 8087, SAO 190050[8] | |
| Database references | |
| SIMBAD | data |
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Chi Capricorni, Latinized from χ Capricorni, is a star in the southern constellation of Capricornus. Based upon an annual parallax shift of 18.14 mas as seen from the Earth,[1] the star is located about 180 light years from the Sun. It is visible to the naked eye with an apparent visual magnitude of +5.28.[2]
Properties
This is an A-type main sequence star with a stellar classification of A0 V.[3] It is a candidate Lambda Boötis star, showing a chemically peculiar spectrum with a low abundance of most elements heavier than oxygen.[7] The star is around 251[5] million years old and is spinning rapidly with a projected rotational velocity of 212[3] km/s. It has 2.78[5] times the mass of the Sun and is radiating 21[6] times the solar luminosity from its photosphere at an effective temperature of 10,878 K.[5]
At an angular separation of 1,199[9] arcseconds lies a faint proper motion companion designated HIP 99550. At the estimated distance of Chi Capricorni, this is equal to a projected separation of 28,300 AU.[9] It has a visual magnitude of 10.94[10] and a classification of M0 Vk,[11] indicating this is a red dwarf star.[9]
Chinese Name
In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Twelve States, refers to an asterism which is represent twelve ancient states in the Spring and Autumn period and the Warring States period, consisting of χ Capricorni, φ Capricorni, ι Capricorni, 38 Capricorni, 35 Capricorni, 36 Capricorni, θ Capricorni, 30 Capricorni, 33 Capricorni, ζ Capricorni, 19 Capricorni, 26 Capricorni, 27 Capricorni, 20 Capricorni, η Capricorni and 21 Capricorni.[12] Consequently, the Chinese name for χ Capricorni itself represents the state Qi (Script error: No such module "Lang".),[13] together with 112 Herculis in Left Wall of Heavenly Market Enclosure (asterism).[14]
R.H.Allen had opinion that χ Capricorni, together with φ Capricorni, were represent the state Wei (魏).[15]
References
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- ↑ a b c d e f Script error: No such module "citation/CS1".
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- ↑ a b c d Script error: No such module "citation/CS1".
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- ↑ Template:Cite simbad
- ↑ a b c Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ 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.
- ↑ Template:In langzh:北方中西星名對照表
- ↑ Template:In langzh:北天中西星名對照表
- ↑ Script error: No such module "citation/CS1".
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