View source for HD 212710

{{About|the star|3=Tianhuang Emperor (disambiguation)}}
{{Starbox begin}}
{{Starbox observe
|epoch=[[J2000.0]]
|constell=[[Cepheus (constellation)|Cepheus]]<ref name="const">{{cite journal |last1=Roman |first1=Nancy G. |title=Identification of a constellation from a position |journal=Publications of the Astronomical Society of the Pacific |date=1987 |volume=99 |page=695 |doi=10.1086/132034 |bibcode=1987PASP...99..695R|s2cid=120559848 |doi-access=free }}</ref>
|ra={{RA|22|13|10.6136}}<ref name="hip">{{cite journal |last1=van Leeuwen |first1=F. |title=Validation of the new Hipparcos reduction |journal=Astronomy and Astrophysics |date=2007 |volume=474 |issue=2 |pages=653–664 |doi=10.1051/0004-6361:20078357 |arxiv=0708.1752 |bibcode=2007A&A...474..653V|s2cid=18759600 }}</ref>
|dec={{DEC|+86|6|28.6366}}<ref name="hip" />
|appmag_v=5.258{{+-|0.009}}<ref name="tycho-2">{{cite journal |last1=Høg |first1=E. |last2=Fabricius |first2=C. |last3=Makarov |first3=V. V. |last4=Urdan |first4=S. |last5=Corbin |first5=T. |last6=Wycoff |first6=G. |last7=Bastian |first7=U. |last8=Schwekendiek |first8=P. |last9=Wicenec |first9=A. |title=The Tycho-2 catalogue of the 2.5 million brightest stars |journal=Astronomy and Astrophysics |date=2000 |volume=335 |pages=L27–L30 |bibcode=2000A&A...355L..27H}}</ref>}}
{{Starbox character
|class = B9.5 Vn<ref name="tycho">{{cite journal |last1=Egret |first1=D. |last2=Didelon |first2=P. |last3=McLean |first3=B. J. |last4=Russell |first4=J. L. |last5=Turon |first5=C. |title=The TYCHO Input Catalogue. Cross- matching the Guide Star Catalog with the HIPPARCOS INCA Data Base. |journal=Astronomy and Astrophysics |date=1992 |volume=258 |pages=217–222 |bibcode=1992A&A...258..217E}}</ref>
|u-b=-0.11<ref name="sloan">{{cite journal |last1=Mallama |first1=A. |title=Erratum: Sloan Magnitudes for the Brightest Stars |journal=The Journal of the American Association of Variable Star Observers |date=2018 |volume=46 |number=1 |page=90 |bibcode=2018JAVSO..46...90M |arxiv=1805.09324}}</ref>
|b-v=-0.03<ref name="sloan" />
}}
{{Starbox astrometry
|radial_v=-6{{+-|5}}<ref>{{cite journal |last1=Gontcharov |first1=G. A. |title=Pulkovo compilation of radial velocities for 35495 stars in a common system. |journal=[[Astronomy Letters]] |date=2006 |volume=32 |issue=11 |pages=759–771 |doi=10.1134/S1063773706110065 |arxiv=1606.08053 |bibcode=2006AstL...32..759G|s2cid=119231169 }}</ref>
|prop_mo_ra=60.554{{+-|0.202}}<ref name="gaiadr3">{{cite journal |author1=Gaia Collaboration |title=VizieR Online Data Catalog: Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022) |journal=Astronomy and Astrophysics |date=2022 |bibcode=2022yCat.1355....0G}}</ref>
|prop_mo_dec=39.468{{+-|0.193}}<ref name="gaiadr3" />
|parallax=12.8648
|p_error=0.1662
|absmag_v=0.79<ref name="xhip">{{cite journal |last1=Anderson |first1=E. |last2=Francis |first2=Ch. |title=XHIP: An extended hipparcos compilation |journal=Astronomy Letters |date=2012 |volume=38 |issue=5 |pages=331–346 |doi=10.1134/S1063773712050015 |bibcode=2012AstL...38..331A |arxiv=1108.4971|s2cid=255204555 }}</ref>
|parallax_footnote=<ref name="gaiadr3" />
}}
{{Starbox detail
|mass=2.61{{+-|0.438|0.254}}<ref name="tess">{{cite arXiv |last1=Paegert |first1=Martin |last2=Stassun |first2=Keivan G. |last3=Collins |first3=Karen A. |last4=Pepper |first4=Joshua |last5=Torres |first5=Guillermo |last6=Jenkins |first6=Jon |last7=Twicken |first7=Joseph D. |last8=Latham |first8=David W. |title=TESS Input Catalog versions 8.1 and 8.2: Phantoms in the 8.0 Catalog and How to Handle Them |date=2021 |class=astro-ph.EP |eprint=2108.04778}}</ref>
|radius=2.387{{+-|0.086|0.052}}<ref name="tess" />
|gravity=4.0991{{+-|0.0652}}<ref name="tess" />
|temperature=10162{{+-|164.7|134}}<ref name="tess" />
|luminosity=53.79{{+-|1.38}}<ref name="gaiadr3" />
}}
{{Starbox catalog
|names=[[Hipparcos#Published_catalogues|HIP]] 109693, [[Bright Star Catalogue|HR]] 8546, [[Astronomische Gesellschaft Katalog|AG]]+85 372, [[Durchmusterung|BD]]+85 383, [[HD Catalog|HD]] 212710, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 3721, [[2MASS]] J22131056+8606287, [[FK5]] 1648
}}
{{Starbox reference
|Simbad=HD+212710}}
{{Starbox end}}
'''HD 212710''', also known as '''BD+85 383''', '''SAO 3721''', '''HR 8546''', '''HIP 109693''' is a star in [[Cepheus (constellation)|Cepheus]]<ref name="const" /> with an apparent magnitude of 5.258<ref name="tycho-2" /> and a spectral type of B9.5 Vn,<ref name="tycho" /> indicating that it is a [[B-type main sequence star]], giving it a blue hue. It's about 254 [[light-year]]s far away from the solar system. It has about 2.61 times the mass of sun, 2.387 times the radius of sun and is 53.79 times as luminous as sun.
== Nomenclature ==
This star doesn't have a [[Bayer designation|Bayer]] or [[Flamsteed designation|Flamsteed]] designation.
It has a Chinese name, "Great Tianhuang Emperor" (Chinese: ''天皇大帝'', ''tiānhuángdàdì'') which means "The Emperor of Heaven". It is an independent [[Chinese constellations|constellation]] in the system of Chinese constellations, belonging to the [[Purple Forbidden enclosure]].{{Cn|date=August 2023}}
== References ==
{{Reflist}}
[[Category:Bright Star Catalogue objects|8546]]
[[Category:Henry Draper Catalogue objects|212710]]
[[Category:Cepheus (constellation)]]