63 Cygni

{{short description|K-type bright giant/supergiant star in the constellation Cygnus}}

{{about|f² Cygni|other stars with this Bayer designation|f Cygni}}

{{Starbox begin

| name = 63 Cygni

}}

{{Starbox observe

| epoch = J2000

| constell = Cygnus

| ra = {{RA|21|06|36.103}}

| dec = {{DEC|+47|38|54.22}}

| appmag_v = 4.56

}}

{{Starbox character

| type =

| class = K4 Ib–IIa

| b-v = {{Val|1.569|0.012}}

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|−26.32|0.23}}

| prop_mo_ra = +5.992

| prop_mo_dec = −1.067

| parallax = 2.66

| p_error = 0.29

| parallax_footnote = {{cite DR2|2165218431284906624}}

| absmag_v = −2.93

}}

{{Starbox detail

| source =

| mass =

| radius = 138

| luminosity = 3,981 - 4,130

| temperature = 3,927{{cite journal |arxiv=1905.03744 |bibcode=2019AJ....158...20M |doi=10.3847/1538-3881/ab1cbd |title=A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2 |year=2019 |last1=Messineo |first1=M. |last2=Brown |first2=A. G. A. |journal=The Astronomical Journal |volume=158 |issue=1 |page=20 |s2cid=148571616 |doi-access=free }}

| gravity = 1.27

| metal_fe = 0.12

| rotational_velocity = 6.3

| age_myr =

}}

{{Starbox catalog

| names = {{odlist | B=f² Cyg | F=63 Cyg | BD=+47°3292 | FK5=3688 | HD=201251 | HIP=104194 | HR=8089 | SAO=50456 | WDS=J21066+4739 }}

}}

{{Starbox reference

| Simbad=63+Cyg

}}

63 Cygni is a single star in the northern constellation of Cygnus, located around 1,030 light years away from Sun. It is visible to the naked eye as an orange-hued star with an apparent visual magnitude of 4.56. 63 Cyg is moving closer to the Earth with a heliocentric radial velocity of −26 km/s.

This is an evolved star showing a stellar spectrum with mixed traits between a bright giant and supergiant. It has been chosen as a spectral standard for the class of K4 Ib–IIa.

For reasons that are not yet clear, 63 Cygni is displaying very long period (982 days) and low-amplitude (742 m/s) variations in radial velocity. The star has expanded to 35 times the Sun's radius and is radiating 4,397 times the Sun's luminosity from its photosphere at an effective temperature of 4,204 K.

References

{{reflist|refs=

{{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

| last1=Earle Luck | first1=R.

| title=Parameters and Abundances in Luminous Stars

| journal=The Astronomical Journal | postscript=.

| volume=147 | issue=6 | pages=137 | year=2014

| bibcode=2014AJ....147..137L | doi=10.1088/0004-6256/147/6/137 | doi-access=free }}

{{citation

| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.

| title=A catalogue of multiplicity among bright stellar systems

| journal=Monthly Notices of the Royal Astronomical Society

| volume=389 | issue=2 | pages=869–879 | date=September 2008

| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E

| arxiv=0806.2878 | s2cid=14878976 | postscript=. }}

{{citation

| title=Low-amplitude and long-period radial velocity variations in giants HD 3574, 63 Cygni, and HD 216946

| display-authors=1 | last1=Lee | first1=B. -C.

| last2=Han | first2=I. | last3=Park | first3=M. -G.

| last4=Hatzes | first4=A. P. | last5=Kim | first5=K. -M.

| journal=Astronomy & Astrophysics

| volume=566 | id=A124 | pages=6 | date=June 2014

| doi=10.1051/0004-6361/201321863 | postscript=.

| bibcode=2014A&A...566A.124L | arxiv=1405.5955 | s2cid=54177778 }}

{{citation | postscript=.

| last1=Lèbre | first1=A. | last2=de Laverny | first2=P.

| last3=Do Nascimento | first3=J. D. Jr. | last4=de Medeiros | first4=J. R.

| title=Lithium abundances and rotational behavior for bright giant stars

| display-authors=1 | journal=Astronomy and Astrophysics

| volume=450 | issue=3 | pages=1173–1179 | date=May 2006

| doi=10.1051/0004-6361:20053485 | bibcode=2006A&A...450.1173L | doi-access=free }}

{{citation

| last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C.

| title=The Perkins catalog of revised MK types for the cooler stars

| journal=Astrophysical Journal Supplement Series

| volume=71 | pages=245 | year=1989 | postscript=.

| bibcode=1989ApJS...71..245K | doi=10.1086/191373 }}

}}

Category:K-type supergiants

Category:K-type bright giants

Category:Cygnus (constellation)

Cygni, f02

Category:Durchmusterung objects