V Cephei

{{Short description|Star in the constellation Cepheus}}

{{Starbox begin}}

{{Starbox observe

| epoch=J2000

| ra= {{RA|23|56|27.804}}

| dec= {{DEC|+83|11|28.02}}

| appmag_v=6.57{{cite journal |last1=Oja |first1=T. |title=UBV photometry of stars whose positions are accurately known. VI. |journal=Astronomy and Astrophysics Supplement Series |date=August 1991 |volume=89 |pages=415 |issn=0365-0138 |bibcode=1991A&AS...89..415O}}

| constell=Cepheus

}}

{{Starbox character

| class=A1V{{cite journal

| last1=Abt | first1=Helmut A. | last2=Morrell | first2=Nidia I.

| title=The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars

| journal=Astrophysical Journal Supplement

| volume=99 | pages=135 | year=1995

| doi=10.1086/192182 | bibcode=1995ApJS...99..135A | doi-access=free }}

| b-v=+0.07

}}

{{Starbox astrometry

| radial_v=−18.74

| prop_mo_ra=+50.676

| prop_mo_dec=+6.869

| parallax=11.1865

| p_error=0.0264

| parallax_footnote = {{cite Gaia DR3|2287540955271768704}}

| absmag_v = +1.78{{cite journal

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

| title=XHIP: An extended hipparcos compilation

| journal=Astronomy Letters

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

| bibcode=2012AstL...38..331A | arxiv=1108.4971

| doi=10.1134/S1063773712050015 | s2cid=119257644 }}

}}

{{Starbox detail

| mass = 2.27{{Cite journal|display-authors=1|last1=Stassun|first1=Keivan G.|last2=Oelkers|first2=Ryan J.|last3=Paegert|first3=Martin|last4=Torres|first4=Guillermo|last5=Pepper|first5=Joshua|last6=De Lee|first6=Nathan|last7=Collins|first7=Kevin|last8=Latham|first8=David W.|last9=Muirhead|first9=Philip S.|last10=Chittidi|first10=Jay|last11=Rojas-Ayala|first11=Bárbara|date=2019-10-01|title=The Revised TESS Input Catalog and Candidate Target List|bibcode=2019AJ....158..138S|journal=The Astronomical Journal|volume=158|issue=4|pages=138|doi=10.3847/1538-3881/ab3467|arxiv=1905.10694 |hdl=1721.1/124721|s2cid=166227927|issn=0004-6256|hdl-access=free |doi-access=free }}

| temperature = 9,004

| luminosity = 17.4

| radius = 1.7

| gravity = 4.33

| rotational_velocity = 147{{cite journal

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

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

| 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 }}

| metal_fe = −0.25{{cite journal |bibcode=2019A&A...628A..94A |title=Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18 |last1=Anders |first1=F. |last2=Khalatyan |first2=A. |last3=Chiappini |first3=C. |last4=Queiroz |first4=A. B. |last5=Santiago |first5=B. X. |last6=Jordi |first6=C. |last7=Girardi |first7=L. |last8=Brown |first8=A. G. A. |last9=Matijevič |first9=G. |last10=Monari |first10=G. |last11=Cantat-Gaudin |first11=T. |last12=Weiler |first12=M. |last13=Khan |first13=S. |last14=Miglio |first14=A. |last15=Carrillo |first15=I. |last16=Romero-Gómez |first16=M. |last17=Minchev |first17=I. |last18=De Jong |first18=R. S. |last19=Antoja |first19=T. |last20=Ramos |first20=P. |last21=Steinmetz |first21=M. |last22=Enke |first22=H. |journal=Astronomy and Astrophysics |year=2019 |volume=628 |pages=A94 |doi=10.1051/0004-6361/201935765 |arxiv=1904.11302 |s2cid=131780028 }}

| age_myr = 373

}}

{{Starbox catalog

| names= {{odlist|V=V Cep|HD=224309|HIP=118027|HR=9056|BD=+82°743|FK5=1650|SAO=3994}}{{cite simbad

| title = V* V Cep

| access-date = August 17, 2010 }}

}}

{{Starbox reference|Simbad=V+Cep}}

{{Starbox end}}

V Cephei is a white main sequence star in the constellation Cepheus. It only varies slightly by 0.03 of a magnitude. It was suspected of being variable by American astronomer Seth Carlo Chandler noting in 1890 that it varied by 0.7 magnitude but that it needed more confirmation. Subsequent observers were divided in whether they noted variability or not.{{cite journal|last=Hoffleit|first=Dorrit|year=1985|title=Was Harlow Shapley Right About V Cephei?|journal=The Journal of the American Association of Variable Star Observers|volume=14|issue=2|pages=64–66|bibcode = 1985JAVSO..14...64H }} A subsequent study with photoelectric photometry showed no variability.{{cite journal|last=Fortier|first=George|year=1989|title=Photoelectric Photometry of V Cephei|journal=The Journal of the American Association of Variable Star Observers|volume=18|issue=1|pages=49–51|bibcode = 1989JAVSO..18...49F }}

With a spectral class of A1V, V Cephei is a main sequence star with a surface temperature of {{val|9,004|fmt=commas|ul=K}}. It has twice the mass of the Sun and, with nearly twice its radius, it shines at {{solar luminosity|17|link=y}}.