SkipCaptcha
1,279
edits
Changes
Jump to navigation
Jump to search
Created page with "{{Night Sky | image = | designation =KY Cyg | rightascension =20<sup>h</sup> 25<sup>m</sup> 58.0435<sup>s</sup><ref name=simbad>{{cite web|url=http://simbad.u-s..."
{{Night Sky
| image =
| designation =KY Cyg
| rightascension =20<sup>h</sup> 25<sup>m</sup> 58.0435<sup>s</sup><ref name=simbad>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=KY+Cygni&submit=submit+id|title=KY Cygni|accessdate=July 28, 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 =+38° 21′ 07.6752″<ref name=simbad/><ref name=Gaia/>
| distance =5,200 ly<ref name=universetoday>{{cite web|url=https://www.universetoday.com/10178/three-largest-stars-discovered/|title=Three Largest Stars Discovered|accessdate=July 28, 2020|publisher=universetoday.com|author=Janet Mason|date=January 11, 2005}}</ref>
| constellation =Cygnus
| type =Supergiant star
| dimensions =
| magnitude =Apparent Mag: +11.14<ref name=universeguide>{{cite web|urll=https://www.universeguide.com/star/120437/kycygni|title=KY Cygni (Supergiant Star) Star Facts|accessdate=July 28, 2020|publisher=universeguide.com}}</ref><br/>Absolute Mag: +0.13<ref>Computed using definition of [[absolute magnitude]] with an apparent magnitude of +11.14 and distance of 5,200 light years.</ref>
| redshift =
| radvelocity =
| propmotion =RA: -3.574 mas/yr<ref name=simbad/><ref name=Gaia/><br/>Dec: -6.279 mas/yr<ref name=simbad/><ref name=Gaia/>
| parallax =0.9151 ± 0.0920 mas<ref name=simbad/><ref name=Gaia/>
}}
'''KY Cygni''' (KY Cyg) is a [[supergiant star]] in the [[constellation]] of [[Cygnus]] and one of the largest stars known.<ref name=universetoday/> The star is thought to have a radius 1,420 times larger than the [[Sun]]'s making it slightly smaller than the radius of the largest star known, [[UY Scuti]], at 1,700 solar radii.<ref name=space.com>{{cite web|url=https://www.space.com/41290-biggest-star.html|title=What Is the Biggest Star?|accessdate=July 28, 2020|publisher=space.com|author=Nola Taylor Redd|date=July 26, 2018}}</ref><ref>A couple of estimations put KY Cygni's radius at 2,850 [[solar radii]], but these are generally thought to be dubious to observational error (see space.com reference).</ref> The star has a surface temperature of 3,500 kelvin, a little cooler than Sol, but the enormous radius means it outputs over 300,000 times more energy than the Sun.<ref>{{cite web|url=https://enacademic.com/dic.nsf/enwiki/1752177|title=KY Cygni|accessdate=July 28, 2020|publisher=enacademic.com}}</ref>
It is situated roughly 5,200 [[light year]]s away from [[Earth]]. This large distance means that is shines at only the eleventh (some sources place it higher at ~14) [[star magnitude|magnitude]], fair too dim to be observed with the unaided eye; a [[telescope is required for observation]]. The two letters at the start of the star's name indicate star has been identified as a [[variable star]], meaning its apparent brightness changes over time.<ref name=universeguide/> Specifically, it hase been classified as an irregular variable and its brightness varies by about two magnitudes.<ref>
{{cite journal
|last1=Samus |first1=N. N.
|last2=Kazarovets |first2=E. V.
|last3=Durlevich |first3=O. V.
|last4=Kireeva |first4=N. N.
|last5=Pastukhova |first5=E. N.
|last6= |first6=
|last7= |first7=
|last8= |first8=
|last9= |first9=
|display-authors=3
|title=General Catalogue of Variable Stars: Version GCVS 5.1
|journal=Astronomy Reports
|volume=61
|issue=1|page=80-88|date=2017
|doi=10.1134/S1063772917010085
|bibcode=2017ARep...61...80S
|ref=harv
}}
</ref><ref>{{cite web|url=http://www.sai.msu.su/gcvs/cgi-bin/search.cgi?search=KY+Cyg|title=KY Cygni|accessdate=July 28, 2020|publisher=sai.msu.su}}</ref> As an irregular variable star, it does not vary in brightness with any discernable period.
==References==
{{reflist}}
{{Stars}}
[[Category:Astronomy]]
[[Category:Stars]]
| image =
| designation =KY Cyg
| rightascension =20<sup>h</sup> 25<sup>m</sup> 58.0435<sup>s</sup><ref name=simbad>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=KY+Cygni&submit=submit+id|title=KY Cygni|accessdate=July 28, 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 =+38° 21′ 07.6752″<ref name=simbad/><ref name=Gaia/>
| distance =5,200 ly<ref name=universetoday>{{cite web|url=https://www.universetoday.com/10178/three-largest-stars-discovered/|title=Three Largest Stars Discovered|accessdate=July 28, 2020|publisher=universetoday.com|author=Janet Mason|date=January 11, 2005}}</ref>
| constellation =Cygnus
| type =Supergiant star
| dimensions =
| magnitude =Apparent Mag: +11.14<ref name=universeguide>{{cite web|urll=https://www.universeguide.com/star/120437/kycygni|title=KY Cygni (Supergiant Star) Star Facts|accessdate=July 28, 2020|publisher=universeguide.com}}</ref><br/>Absolute Mag: +0.13<ref>Computed using definition of [[absolute magnitude]] with an apparent magnitude of +11.14 and distance of 5,200 light years.</ref>
| redshift =
| radvelocity =
| propmotion =RA: -3.574 mas/yr<ref name=simbad/><ref name=Gaia/><br/>Dec: -6.279 mas/yr<ref name=simbad/><ref name=Gaia/>
| parallax =0.9151 ± 0.0920 mas<ref name=simbad/><ref name=Gaia/>
}}
'''KY Cygni''' (KY Cyg) is a [[supergiant star]] in the [[constellation]] of [[Cygnus]] and one of the largest stars known.<ref name=universetoday/> The star is thought to have a radius 1,420 times larger than the [[Sun]]'s making it slightly smaller than the radius of the largest star known, [[UY Scuti]], at 1,700 solar radii.<ref name=space.com>{{cite web|url=https://www.space.com/41290-biggest-star.html|title=What Is the Biggest Star?|accessdate=July 28, 2020|publisher=space.com|author=Nola Taylor Redd|date=July 26, 2018}}</ref><ref>A couple of estimations put KY Cygni's radius at 2,850 [[solar radii]], but these are generally thought to be dubious to observational error (see space.com reference).</ref> The star has a surface temperature of 3,500 kelvin, a little cooler than Sol, but the enormous radius means it outputs over 300,000 times more energy than the Sun.<ref>{{cite web|url=https://enacademic.com/dic.nsf/enwiki/1752177|title=KY Cygni|accessdate=July 28, 2020|publisher=enacademic.com}}</ref>
It is situated roughly 5,200 [[light year]]s away from [[Earth]]. This large distance means that is shines at only the eleventh (some sources place it higher at ~14) [[star magnitude|magnitude]], fair too dim to be observed with the unaided eye; a [[telescope is required for observation]]. The two letters at the start of the star's name indicate star has been identified as a [[variable star]], meaning its apparent brightness changes over time.<ref name=universeguide/> Specifically, it hase been classified as an irregular variable and its brightness varies by about two magnitudes.<ref>
{{cite journal
|last1=Samus |first1=N. N.
|last2=Kazarovets |first2=E. V.
|last3=Durlevich |first3=O. V.
|last4=Kireeva |first4=N. N.
|last5=Pastukhova |first5=E. N.
|last6= |first6=
|last7= |first7=
|last8= |first8=
|last9= |first9=
|display-authors=3
|title=General Catalogue of Variable Stars: Version GCVS 5.1
|journal=Astronomy Reports
|volume=61
|issue=1|page=80-88|date=2017
|doi=10.1134/S1063772917010085
|bibcode=2017ARep...61...80S
|ref=harv
}}
</ref><ref>{{cite web|url=http://www.sai.msu.su/gcvs/cgi-bin/search.cgi?search=KY+Cyg|title=KY Cygni|accessdate=July 28, 2020|publisher=sai.msu.su}}</ref> As an irregular variable star, it does not vary in brightness with any discernable period.
==References==
{{reflist}}
{{Stars}}
[[Category:Astronomy]]
[[Category:Stars]]