Chi Capricorni

{{Starbox begin

| name = Chi Capricorni

}}

{{Starbox image

| image=

{{Location mark

|image=Capricornus constellation map.svg|alt=|float=center|width=280

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link= χ Cap

|x=436|y=602

}}

|caption=Location of χ Capricorni (circled)

}}{{Starbox observe

| epoch = J2000.0

| equinox = J2000.0 (ICRS)

| constell = Capricornus

| ra = {{RA|21|08|33.62529}}

| dec = {{DEC|−21|11|37.2177}}

| appmag_v = +5.28

}}

{{Starbox character

| class = A0 V

| b-v = +0.01

| u-b =

| r-i =

| variable =

}}

{{Starbox astrometry

| radial_v =

| prop_mo_ra = +19.83

| prop_mo_dec = −60.15

| parallax = 18.14

| p_error = 0.31

| parallax_footnote =

| absmag_v = +1.59

}}

{{Starbox detail

| source =

| mass = 2.78

| radius =

| luminosity = 21

| temperature = {{Val|10878|370|fmt=commas}}

| gravity = {{Val|4.33|0.14}}

| metal_fe = {{Val|−0.41|0.06}}

| rotational_velocity = 212

| age_myr = 251

}}

{{Starbox catalog

| names = χ Cap, 25 Cap, BD−21° 5933, FK5 3690, HD 201184, HIP 104365, HR 8087, SAO 190050

}}

{{Starbox reference

| Simbad = chi+Cap

}}

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, 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.

Properties

This is an A-type main sequence star with a stellar classification of A0 V. It is a candidate Lambda Boötis star, showing a chemically peculiar spectrum with a low abundance of most elements heavier than oxygen. The star is around 251 million years old and is spinning rapidly with a projected rotational velocity of 212 km/s. It has 2.78 times the mass of the Sun and is radiating 21 times the solar luminosity from its photosphere at an effective temperature of 10,878 K.

At an angular separation of 1,199 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. It has a visual magnitude of 10.94 and a classification of M0 Vk, indicating this is a red dwarf star.

Chinese Name

In Chinese, {{lang|zh|十二國}} ({{lang|zh-Latn|Shíer Guó}}), 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.{{in lang|zh}} 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, {{ISBN|978-986-7332-25-7}}. Consequently, the Chinese name for χ Capricorni itself represents the state Qi ({{lang|zh|齊}}),{{in lang|zh}}:zh:北方中西星名對照表 together with 112 Herculis in Left Wall of Heavenly Market Enclosure (asterism).{{in lang|zh}}:zh:北天中西星名對照表

R.H.Allen had opinion that χ Capricorni, together with φ Capricorni, were represent the state Wei (魏).

References

{{reflist|refs=

{{citation

| title=Validation of the new Hipparcos reduction

| last1=van Leeuwen | first1=F.

| journal=Astronomy and Astrophysics

| volume=474 | issue=2 | pages=653–664 | date=2007

| arxiv=0708.1752 | bibcode=2007A&A...474..653V

| doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}

{{citation

| title=XHIP: An extended hipparcos compilation

| last1=Anderson | first1=E. | last2=Francis | first2=Ch.

| journal=Astronomy Letters

| volume=38 | issue=5 | pages=331 | year=2012

| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015

| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}

{{citation

| title=The elemental abundance pattern of twenty lambda Bootis candidate stars

| display-authors=1 | last1=Andrievsky | first1=S. M.

| last2=Chernyshova | first2=I. V. | last3=Paunzen | first3=E.

| last4=Weiss | first4=W. W. | last5=Korotin | first5=S. A.

| last6=Beletsky | first6=Yu. V. | last7=Handler | first7=G.

| last8=Heiter | first8=U. | last9=Korotina | first9=L.

| last10=Stütz | first10=C. | last11=Weber | first11=M.

| journal=Astronomy and Astrophysics | postscript=.

| volume=396 | pages=641–648 | date=December 2002

| issue=2 | doi=10.1051/0004-6361:20021423 | bibcode=2002A&A...396..641A | doi-access=free }}

{{citation

| title=The Tycho-2 catalogue of the 2.5 million brightest stars

| display-authors=1 | last1=Høg | first1=E.

| last2=Fabricius | first2=C. | last3=Makarov | first3=V. V.

| last4=Urban | first4=S. | last5=Corbin | first5=T.

| last6=Wycoff | first6=G. | last7=Bastian | first7=U.

| last8=Schwekendiek | first8=P. | last9=Wicenec | first9=A.

| journal=Astronomy and Astrophysics

| volume=355 | pages=L27–L30 | date=March 2000

| bibcode=2000A&A...355L..27H | postscript=. | doi=10.1888/0333750888/2862}}

{{citation | display-authors=1

| last1=Gray | first1=R. O. | last2=Corbally | first2=C. J.

| last3=Garrison | first3=R. F. | last4=McFadden | first4=M. T.

| last5=Bubar | first5=E. J. | last6=McGahee | first6=C. E.

| last7=O'Donoghue | first7=A. A. | last8=Knox | first8=E. R.

| title=Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample

| journal=The Astronomical Journal

| volume=132 | issue=1 | pages=161–170 | date=July 2006

| doi=10.1086/504637 | bibcode=2006AJ....132..161G

| arxiv=astro-ph/0603770 | s2cid=119476992 | postscript=. }}

{{citation | display-authors=1

| last1=Dhital | first1=Saurav | last2=West | first2=Andrew A.

| last3=Stassun | first3=Keivan G. | last4=Bochanski | first4=John J.

| title=Sloan Low-mass Wide Pairs of Kinematically Equivalent Stars (SLoWPoKES): A Catalog of Very Wide, Low-mass Pairs

| journal=The Astronomical Journal

| volume=139 | issue=6 | pages=2566–2586 | date=June 2010

| doi=10.1088/0004-6256/139/6/2566 | bibcode=2010AJ....139.2566D

| arxiv=1004.2755 | s2cid=661494 | postscript=. }}

{{citation

| display-authors=1 | last1=McDonald | first1=I.

| last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L.

| title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars

| journal=Monthly Notices of the Royal Astronomical Society

| bibcode=2012MNRAS.427..343M | arxiv=1208.2037

| doi=10.1111/j.1365-2966.2012.21873.x | doi-access=free | s2cid=118665352 }}

{{citation

| title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets

| last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A.

| journal=The Astrophysical Journal

| volume=804 | issue=2 | pages=146 | year=2015

| bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146

| arxiv=1501.03154 | s2cid=33401607 | postscript=. }}

{{citation

| title=Rotational velocities of A-type stars. III. Velocity distributions

| journal=Astronomy and Astrophysics

| volume=463 | issue=2 | pages=671–682 | date=February 2007

| doi=10.1051/0004-6361:20065224 | bibcode=2007A&A...463..671R

| arxiv=astro-ph/0610785 | s2cid=18475298 | postscript=. }}

{{citation