编辑“︁UGC 12158”︁

{{Infobox galaxy
| name = [[Uppsala General Catalogue|UGC]] 12158
| image = [[File:UGC 12158.jpg|UGC 12158|300px]]
| caption = [[棒旋星系]] UGC 12158
| epoch = [[J2000]]
| ra = {{RA|22|42|10.496}}<ref name="simbad"/>
| dec = {{DEC|19|59|49.21}}<ref name="simbad">{{cite simbad|title=PGC 69533|access-date=May 17, 2017}}</ref>
| constellation name = [[飞马座]]
| z = 0.030985<ref name="ned">{{cite web
|title=NED results for object PGC 069533
|work=NASA/IPAC Extragalactic Database
|url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=PGC+069533&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES
|accessdate=May 17, 2017
|archive-date=2018-08-12
|archive-url=https://web.archive.org/web/20180812151409/http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=PGC+069533&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES
|dead-url=no
}}</ref>
| h_radial_v = 9,289 km/s<ref name="ned" />
| type = Sb<ref name="ned" />
| dist_ly = 384 million [[光年]] (117.86 [[百万秒差距]])<ref name="ned" />
| appmag_b = 15.3<ref name="ned" />
| appmag_v = 14.5<ref name="ned" />
| size_v = 1.2' &times; 1.1'<ref name="ned" />
| notes = 
| names = [[Principal Galaxies Catalogue|PGC]] 69533, [[Uppsala General Catalogue|UGC]] 12158, [[Morphological Catalogue of Galaxies|MCG]]+03-57-032, [[2MASS|2MASX]] J22421049+1959492, SDSS J224210.53+195948.8, GALEXASC J224210.44+195949.5 <ref name="ned" />
}}
'''UGC 12158'''或'''PGC 69533'''是一个Sb类型的[[棒旋星系]]，距离[[地球]]约{{convert|384000000|ly|Mpc|abbr=on|sigfig=3}}远，位于[[飞马座]]。它的螺旋盘很致密，盘跨度约为{{convert|140000|ly|kpc|abbr=on|sigfig=1}}<ref name="ned"/>。它的盘面和旋臂布局与[[银河系]]十分相近，多半是因为它的盘面倾斜角几乎与视线垂直。<ref name="Platt2011">{{cite web
|title=The Milky Way's (almost) identical twin
|work=Phil Platt
|url=http://blogs.discovermagazine.com/badastronomy/2011/01/07/the-milky-ways-almost-identical-twin/#more-25551
|accessdate=May 17, 2017
|archive-date=2018-10-01
|archive-url=https://web.archive.org/web/20181001201543/http://blogs.discovermagazine.com/badastronomy/2011/01/07/the-milky-ways-almost-identical-twin/#more-25551
|dead-url=no
}}</ref>

==2004年超新星==
2003年12月15日，科学家们在靠近UGC 12158的其中一条旋臂上记录到一颗19.2星等的[[Ia超新星|Ia类型超新星]]，天文学家将这颗超新星命名为[[SN 2004EF]]<ref name="Bishop2004">{{cite web
|title=Supernova 2004ef in UGC 12158
|work=David Bishop
|url=http://www.rochesterastronomy.org/sn2004/sn2004ef.html
|accessdate=December 14, 2016
|archive-date=2016-09-10
|archive-url=https://web.archive.org/web/20160910102348/http://www.rochesterastronomy.org/sn2004/sn2004ef.html
|dead-url=no
}}</ref> (即右侧图像中蓝色的星点<ref name="Platt2011" />) 。2004年9月4日，它的亮度达到了17.5[[星等|等]]，随后慢慢减弱，消失不见<ref name="iaucirc2004">{{cite journal
|first1=Boles 
|last1=T.
|first2=Armstrong
|last2=M.
|title = Supernova 2004ef in UGC 12158
|journal=IAU Circular
|year=2004
|volume=8403
|bibcode=2004IAUC.8403....2F}}</ref>。2014年9月7日科学家们获得了它的[[可见光]][[光谱]]，确认为I型超新星。<ref name="iaucirc2004a">{{cite journal
|first=Folatelli 
|last=G.
|display-authors=etal.
|title = Supernova 2004ef in UGC 12158
|journal=IAU Circular
|year=2004
|volume=8399
|bibcode=2004IAUC.8399....2B
}}</ref>在早期的研究图像中没有发现这颗超新星的前体星。<ref name="iaucirc2004" />

==参考链接==
{{reflist}}

==参考链接==
* [https://www.spacetelescope.org/images/potw1035a/ Barred spiral bares all] {{Wayback|url=https://www.spacetelescope.org/images/potw1035a/ |date=20201109040834 }}
* [http://blogs.discovermagazine.com/badastronomy/2011/01/07/the-milky-ways-almost-identical-twin/#more-25551 The Milky Way's (almost) identical twin]{{Wayback|url=http://blogs.discovermagazine.com/badastronomy/2011/01/07/the-milky-ways-almost-identical-twin/#more-25551 |date=20181001201543 }}

[[Category:UGC天體|12158]]
[[Category:飞马座]]
[[Category:棒旋星系]]
[[Category:PGC天體|69533]]


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