KY Cygni: Perbedaan antara revisi
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Baris 1:
{{Starbox begin
| name = KY Cygni
}}
{{Starbox image
| image=
{{Location mark
|image=Sadr Region rgb.jpg|alt=|float=center|width=250
|label=|position=right
|mark=Red circle.svg|mark_width=10|mark_link=KY Cyg
|x=215|y=193
}}
|caption=Lokasi KY Cygni (dilingkari, timur berada di atas)
}}
{{Starbox observe
| epoch = [[J2000.0]]
| equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]])
| constell = [[Cygnus (constellation)|Cygnus]]
| ra = {{RA|20|25|58.04}}<ref name=edr3>{{Cite journal|last=Gaia Collaboration|last2=Brown|first2=A. G. A.|last3=Vallenari|first3=A.|last4=Prusti|first4=T.|last5=de Bruijne|first5=J. H. J.|last6=Babusiaux|first6=C.|last7=Biermann|first7=M.|last8=Creevey|first8=O. L.|last9=Evans|first9=D. W.|date=2021-05-01|title=Gaia Early Data Release 3. Summary of the contents and survey properties|url=https://ui.adsabs.harvard.edu/abs/2021A&A...649A...1G|journal=Astronomy and Astrophysics|volume=649|pages=A1|doi=10.1051/0004-6361/202039657|issn=0004-6361}} [http://vizier.u-strasbg.fr/viz-bin/VizieR-S?Gaia%20EDR3%202058131491974019968 Catatan Gaia DR3 untuk sumber ini] di [[VizieR]].</ref>
| dec = {{DEC|+38|21|07.7}}<ref name=edr3/>
| appmag_v=11.14<ref name=mauron>{{cite journal|bibcode=2011A&A...526A.156M|title=The mass-loss rates of red supergiants and the de Jager prescription|journal=Astronomy and Astrophysics|volume=526|pages=A156|last1=Mauron|first1=N.|last2=Josselin|first2=E.|year=2011|doi=10.1051/0004-6361/201013993|arxiv = 1010.5369 |s2cid=119276502}}</ref> {{nowrap|(10.60 - 11.74<ref name=alfonso-garzon>{{cite journal |bibcode=2012A&A...548A..79A |title=The first INTEGRAL-OMC catalogue of optically variable sources |journal=Astronomy & Astrophysics |volume=548 |page=A79 |last1=Alfonso-Garzón |first1=J. |last2=Domingo |first2=A. |last3=Mas-Hesse |first3=J. M. |last4=Giménez |first4=A. |year=2012 |arxiv=1210.0821 |doi=10.1051/0004-6361/201220095|s2cid=118428054 }}</ref>)}}
}}
{{Starbox character
| class = M3 Ia<ref name=white>{{cite journal|bibcode=1978ApJ...222..209W|title=Photoelectric two-dimensional spectral classification of M supergiants|journal=Astrophysical Journal|volume=222|pages=209|last1=White|first1=N. M.|last2=Wing|first2=R. F.|year=1978|doi=10.1086/156136}}</ref> (M3.5 Ia<ref name=gcvs1>KY Cyg, database entry, [http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars] {{Webarchive|url=https://web.archive.org/web/20170620004609/http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat |date=2017-06-20 }}, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 12, 2010.</ref> (M3.5 Ia<ref name=gcvs1/>)
| b-v = +3.39<ref name=mauron/>
| u-b = +2.91<ref name=mauron/>
| variable = [[Slow irregular variable|Lc]]<ref name=gcvs1/>
}}
{{Starbox astrometry
| prop_mo_ra = –3.556<ref name=edr3/>
| prop_mo_dec = –6.061<ref name=edr3/>
| parallax = 0.6687
| p_error = 0.0517
| parallax_footnote = <ref name=edr3/>
| dist_pc =
| dist_ly =
| absmag_v = –8.18<ref name=levesque>{{cite journal|bibcode=2005ApJ...628..973L|title=The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought|journal=The Astrophysical Journal|volume=628|issue=2|pages=973–985|author1-link=Emily Levesque|last1=Levesque|first1=Emily M.|last2=Massey|first2=Philip|last3=Olsen|first3=K. A. G.|last4=Plez|first4=Bertrand|last5=Josselin|first5=Eric|last6=Maeder|first6=Andre|last7=Meynet|first7=Georges|year=2005|doi=10.1086/430901|arxiv = astro-ph/0504337 |s2cid=15109583}}</ref>
}}
{{Starbox detail
| mass = 19<ref name="Comeron"/>
| radius = 1,033<ref name="Comeron">{{Cite journal|last1=Comerón|first1=F.|last2=Djupvik|first2=A. A.|last3=Schneider|first3=N.|last4=Pasquali|first4=A.|date=October 2020|title=The historical record of massive star formation in Cygnus|journal=Astronomy & Astrophysics|volume=644|pages=A62|arxiv=2009.12779|bibcode=2020A&A...644A..62C|doi=10.1051/0004-6361/202039188|s2cid=221970180}}</ref>
| temperature=3,550<ref name=messinio2019>{{cite journal |bibcode=2019AJ....158...20M |title=A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2 |last1=Messineo |first1=M. |last2=Brown |first2=A. G. A. |journal=The Astronomical Journal |year=2019 |volume=158 |issue=1 |pages=20 |doi=10.3847/1538-3881/ab1cbd |arxiv=1905.03744 |s2cid=148571616 }}</ref>
| luminosity = 138,000<ref name=mauron/> – 270,000<ref name=levesque/><ref name=trevor>{{cite journal|arxiv=2008.11723|last1=Dorn-Wallenstein|first1=Trevor Z.|last2=Levesque|first2=Emily M.|last3=Neugent|first3=Kathryn F.|last4=Davenport|first4=James R. A.|last5=Morris|first5=Brett M.|last6=Gootkin|first6=Keyan|title=Short Term Variability of Evolved Massive Stars with TESS II: A New Class of Cool, Pulsating Supergiants|journal=The Astrophysical Journal|year=2020|volume=902|issue=1|page=24|doi=10.3847/1538-4357/abb318|bibcode=2020ApJ...902...24D|s2cid=221340538}}</ref>
| metal=
| gravity=−0.5 (−0.9?)<ref name=levesque/>
| rotation=
| age=
}}
{{Starbox catalog
| names=[[Variable star designation|KY]] Cyg, [[Guide Star Catalog|GSC]] 03152-01140, [[IRAS]] 20241+3811, IRC+40415, [[Tycho Catalogue|TYC]] 3152-1140-1, [[RAFGL]] 2575, [[USNO CCD Astrograph Catalog|UCAC2]] 45230193, [[2MASS]] J20255805+3821076
}}
{{Starbox reference
| Simbad=KY+Cyg}}
{{Starbox end}}
'''KY Cygni''' adalah bintang [[Superraksasa]] merah dari [[kelas spektrum]] M3.5la yang terletak di rasi bintang [[Cygnus]].<ref>{{Cite web|url=https://www.universeguide.com/star/kycygni|title=KY Cygni (Supergiant Star) Star Facts|website=Universe Guide|language=en|access-date=2020-02-15}}</ref> KY Cygni merupakan salah satu bintang terbesar dan paling bercahaya yang pernah diketahui, dengan luminositas sekitar 300.000 kali lebih dari matahari dengan radius 1.000 kali ruas jari jari matahari. Jika ditempatkan di Tata Surya maka fotosfernya akan mencapai orbit Jupiter atau mungkin Saturnus.
== Referensi ==
<references />
== Pranala luar ==
* http://jumk.de/astronomie/big-stars/ky-cygni.shtml
* http://www.astronomy.com/asy/default.aspx?c=a&id=2772
[[Kategori:Maharaksasa merah]]
[[Kategori:Rasi bintang Cygnus]]
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