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Created page with "{{Night Sky | image = | designation =IRAS 22317+5838 | rightascension =22<sup>h</sup> 33<sup>m</sup> 34.6349<sup>s</sup><ref name=simbad>{{cite web|url=http://s..."
{{Night Sky
| image =
| designation =IRAS 22317+5838
| rightascension =22<sup>h</sup> 33<sup>m</sup> 34.6349<sup>s</sup><ref name=simbad>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=V354+Cephei|title=V354 Cephei|accessdate=July 06, 2020|work=Simbad Astronomical Database|publisher=simbad.u-strasbg.fr}}</ref><ref name=Gaia>{{cite journal
|last1=Gaia Collaboration |first1=
|title=VizieR Online Data Catalog: Gaia DR2
|journal=VizieR Online Data Catalog
|volume=I/345
|issue=|page=I/345|date=2018
|doi=
|bibcode=2018yCat.1345....0G
|ref=harv
}} {{arXiv|0708.1752}}</ref>
| declination =+58° 52′ 47.1259″<ref name=simbad/><ref name=Gaia/>
| distance =9,000 ly<ref name=universeguide>{{cite web|url=https://www.universeguide.com/star/120435/v354cephei|title=V354 Cephei|accessdate=July 06, 2020|publisher=universeguide}}</ref>
| constellation =Cepheus
| type =Supergiant
| dimensions =
| magnitude =Apparent Mag: +10.42<ref name=universeguide/>
| redshift =
| radvelocity =-59.42 ± 0.28 km/s<ref name=simbad/><ref name=Gaia/>
| propmotion =RA: -2.816 mas/yr<ref name=simbad/><ref name=Gaia/><br/>Dec: -2.510 mas/yr<ref name=simbad/><ref name=Gaia/>
| parallax =0.4581 ± 0.1023 mas<ref name=simbad/><ref name=Gaia/>
}}
'''V354 Cephei''' is a [[Supergiant star]] in the [[constellation]] of [[Cepheus]].<ref name=zmescience>{{cite web|url=https://www.zmescience.com/science/largest-stars-feature/|title=The largest stars in the Universe (that we’ve found so far)|accessdate=July 06, 2020|publisher=zemscience.com|author=Janet Mason|date=Janurary 16, 2020}}</ref> It is one of the largest stars known, thought to have a radius over 1,500 times greater than the [[Sun]]'s.<ref> This would mean the star's outer layers extend significantly beyond [[Saturn]] if it replaced the Sun.<ref>{{cite web|url=https://www.universetoday.com/10178/three-largest-stars-discovered/|title=Three Largest Stars Discovered|accessdate=July 06, 2020|publisher=universetoday.com|author=Fraser Cain|date=January 11, 2005}}</ref> While it has one of the largest radii of any star known, it has a more modest mass estimated at 25 [[solar mass]]es.<ref name=universetoday/> Its luminosity is estimated to be 300, times greater than Sol's. A medium sized (4.5 - 6.0 inches) [[telescope]] is required to observe the star as although large, appears faint in the night sky.
V354 Cephei is located 9,000 [[light year]]s from [[Earth]]<ref name=universeguide/> The enormous distance means it shines with an [[apparent magnitude]] of +10.42. The star is known to be a [[variable star]] with its [[star magnitude|magnitude]] varying by around 0.5.<ref>{{cite web|url=http://www.sai.msu.su/gcvs/cgi-bin/ident.cgi?cat=IRAS+&num=22317%2B5838|title=IRAS 22317+5838|accessdate=July 06, 2020|publisher=sai.msu.su|work=General Catalogue of Variable Stars}}</ref><ref>
{{cite journal
|last1=Abramian |first1=G. B.
|display-authors=3
|title=New Variable M Supergiant Stars
|journal=Communications of the Byurakan Astrophysical Observatory (ComBAO)
|volume=52
|issue=|page=13-23|date=1980
|doi=
|bibcode=1980SoByu..52...13A
|ref=harv
}}
</ref> The star's period is not known, it may be an irregular variable.
==References==
{{reflist}}
{{Stars}}
[[Category:Astronomy]]
[[Category:Stars]]
| image =
| designation =IRAS 22317+5838
| rightascension =22<sup>h</sup> 33<sup>m</sup> 34.6349<sup>s</sup><ref name=simbad>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=V354+Cephei|title=V354 Cephei|accessdate=July 06, 2020|work=Simbad Astronomical Database|publisher=simbad.u-strasbg.fr}}</ref><ref name=Gaia>{{cite journal
|last1=Gaia Collaboration |first1=
|title=VizieR Online Data Catalog: Gaia DR2
|journal=VizieR Online Data Catalog
|volume=I/345
|issue=|page=I/345|date=2018
|doi=
|bibcode=2018yCat.1345....0G
|ref=harv
}} {{arXiv|0708.1752}}</ref>
| declination =+58° 52′ 47.1259″<ref name=simbad/><ref name=Gaia/>
| distance =9,000 ly<ref name=universeguide>{{cite web|url=https://www.universeguide.com/star/120435/v354cephei|title=V354 Cephei|accessdate=July 06, 2020|publisher=universeguide}}</ref>
| constellation =Cepheus
| type =Supergiant
| dimensions =
| magnitude =Apparent Mag: +10.42<ref name=universeguide/>
| redshift =
| radvelocity =-59.42 ± 0.28 km/s<ref name=simbad/><ref name=Gaia/>
| propmotion =RA: -2.816 mas/yr<ref name=simbad/><ref name=Gaia/><br/>Dec: -2.510 mas/yr<ref name=simbad/><ref name=Gaia/>
| parallax =0.4581 ± 0.1023 mas<ref name=simbad/><ref name=Gaia/>
}}
'''V354 Cephei''' is a [[Supergiant star]] in the [[constellation]] of [[Cepheus]].<ref name=zmescience>{{cite web|url=https://www.zmescience.com/science/largest-stars-feature/|title=The largest stars in the Universe (that we’ve found so far)|accessdate=July 06, 2020|publisher=zemscience.com|author=Janet Mason|date=Janurary 16, 2020}}</ref> It is one of the largest stars known, thought to have a radius over 1,500 times greater than the [[Sun]]'s.<ref> This would mean the star's outer layers extend significantly beyond [[Saturn]] if it replaced the Sun.<ref>{{cite web|url=https://www.universetoday.com/10178/three-largest-stars-discovered/|title=Three Largest Stars Discovered|accessdate=July 06, 2020|publisher=universetoday.com|author=Fraser Cain|date=January 11, 2005}}</ref> While it has one of the largest radii of any star known, it has a more modest mass estimated at 25 [[solar mass]]es.<ref name=universetoday/> Its luminosity is estimated to be 300, times greater than Sol's. A medium sized (4.5 - 6.0 inches) [[telescope]] is required to observe the star as although large, appears faint in the night sky.
V354 Cephei is located 9,000 [[light year]]s from [[Earth]]<ref name=universeguide/> The enormous distance means it shines with an [[apparent magnitude]] of +10.42. The star is known to be a [[variable star]] with its [[star magnitude|magnitude]] varying by around 0.5.<ref>{{cite web|url=http://www.sai.msu.su/gcvs/cgi-bin/ident.cgi?cat=IRAS+&num=22317%2B5838|title=IRAS 22317+5838|accessdate=July 06, 2020|publisher=sai.msu.su|work=General Catalogue of Variable Stars}}</ref><ref>
{{cite journal
|last1=Abramian |first1=G. B.
|display-authors=3
|title=New Variable M Supergiant Stars
|journal=Communications of the Byurakan Astrophysical Observatory (ComBAO)
|volume=52
|issue=|page=13-23|date=1980
|doi=
|bibcode=1980SoByu..52...13A
|ref=harv
}}
</ref> The star's period is not known, it may be an irregular variable.
==References==
{{reflist}}
{{Stars}}
[[Category:Astronomy]]
[[Category:Stars]]