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NGC 474 - 版本历史
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<p><b>新页面</b></p><div>{{Sky|01|20|06.7|+|03|24|58|100000000}}<br />
{{Infobox galaxy<br />
|name=[[NGC天體表|NGC]] 474<br />
|image=[[File:NGC 474 Hubble WikiSky.jpg|200px]]<br />
|caption=[[哈伯太空望遠鏡]]拍攝NGC 474影像。（[[NASA]]、[[太空望遠鏡科學研究所|STScI]]、{{link-en|SKY-MAP.ORG|Sky-Map.org|Sky-map.org}}） <br />
|constellation name=[[雙魚座]]<ref name="schirmer">{{Cite web<br />
|last = Schirmer<br />
|first = Mischa<br />
|title = NGC 474<br />
|url = http://www.astro.uni-bonn.de/~mischa/gallery_ccd/ngc474.html<br />
|accessdate = 2011-02-26<br />
|deadurl = yes<br />
|archiveurl = https://web.archive.org/web/20110629170812/http://www.astro.uni-bonn.de/~mischa/gallery_ccd/ngc474.html<br />
|archivedate = 2011-06-29<br />
|df = <br />
}}</ref><br />
|epoch=J2000<ref name="ned">{{Cite web<br />
|title=NED results for object NGC 0474*<br />
|url=http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+474&extend=yes&out_equinox=J2000.0<br />
|work=[[NASA/IPAC外银河系数据库|NASA/IPAC Extragalactic Database]]<br />
|accessdate=2011-02-26<br />
|archive-date=2019-10-18<br />
|archive-url=https://web.archive.org/web/20191018184453/http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+474&extend=yes&out_equinox=J2000.0<br />
|dead-url=no<br />
}}</ref><br />
|ra={{RA|01|20|06.7}}<ref name="ned" /><br />
|dec={{DEC|+03|24|58}}<ref name="ned" /><br />
|z=0.007755<ref name="ned" /><br />
|h_radial_v=2325 km/s ±7 km/s<ref name="ned" /><br />
|gal_v=2398 km/s ±7 km/s<ref name="ned" /><br />
|dist_ly=~100 M[[光年|ly]] (~31 M[[秒差距|pc]])<ref name="schirmer" /><br />
|group_cluster=<br />
|type=[[透鏡狀星系|S0]]<ref name="sedsingc">{{Cite web<br />
|title=Revised NGC Data for NGC 474<br />
|url=http://spider.seds.org/ngc/revngcic.cgi?NGC474<br />
|work=The Interactive NGC Catalog Online<br />
|accessdate=2011-02-26<br />
|archive-date=2018-10-10<br />
|archive-url=https://web.archive.org/web/20181010095516/http://spider.seds.org/ngc/revngcic.cgi?NGC474<br />
|dead-url=no<br />
}}</ref><br />
|mass=<!-- In solar masses --><br />
|stars=<br />
|appmag_v=<br />
|size_v=<br />
|size=250,000 ly (直徑)<ref name="apod">{{Cite web<br />
|title=Galaxy NGC 474<br />
|url=https://apod.nasa.gov/apod/ap180206.html<br />
|work=NASA Astronomy Picture of the Day<br />
|accessdate=2018-02-07<br />
|archive-date=2018-02-06<br />
|archive-url=https://web.archive.org/web/20180206052742/https://apod.nasa.gov/apod/ap180206.html<br />
|dead-url=no<br />
}}</ref><br />
|notes=<br />
|names=[[特殊星系圖集|Arp]] 227, [[星系形态目录|MCG]] 0-4-85, [[主要星系目录|PGC]] 4801, [[乌普萨拉总目录|UGC]] 864, ZWG 385.71<ref name="sedsingc" /><br />
|references=}}<br />
'''NGC 474''' 是[[雙魚座]]的一個[[透鏡狀星系]]，距離地球約1億光年。該星系以存在形成原因不明的[[潮汐尾]]而聞名<ref name="schirmer" />。<br />
<br />
== 超新星 ==<br />
2017年7月，天文學家在NGC 474內發現[[Ia超新星]]SN 2017fgc<ref name="TNS">{{cite web|title=SN 2017 fgc|url=https://wis-tns.weizmann.ac.il/object/2017fgc|website=Transient Name Server|accessdate=9 February 2018|archive-date=2018-02-10|archive-url=https://web.archive.org/web/20180210180352/https://wis-tns.weizmann.ac.il/object/2017fgc|dead-url=yes}}</ref>。該超新星距離宿主星系的核心區域有一定距離<ref name="King">{{cite web|last1=King|first1=Bob|title=Sky Surprises: New Comet ASASSN1, Nova in Scutum, and Supernova in Pisces!|url=http://www.skyandtelescope.com/observing/sky-surprises-new-comet-c2017-o1-scutum-nova-and-a-supernova-to-boot/|website=Sky & Telescope|accessdate=2018-02-21|archive-date=2017-10-07|archive-url=https://web.archive.org/web/20171007170655/http://www.skyandtelescope.com/observing/sky-surprises-new-comet-c2017-o1-scutum-nova-and-a-supernova-to-boot/|dead-url=no}}</ref>。<br />
<br />
==延伸閱讀==<br />
*Turnbull, A. J.; Carter, D.; Bridges, T. J.; Thomson, R. C. (1999) [http://adsabs.harvard.edu/abs/1999IAUS..186..191T Shell Formation in NGC474]{{Wayback|url=http://adsabs.harvard.edu/abs/1999IAUS..186..191T |date=20171020172715 }}<br />
<br />
==參考資料==<br />
{{Reflist}}<br />
<br />
==外部連結==<br />
*[https://apod.nasa.gov/apod/ap071008.html Galaxy NGC 474: Cosmic Blender]{{Wayback|url=https://apod.nasa.gov/apod/ap071008.html |date=20180303143935 }}, NASA Astronomy Picture of the Day (8 October 2007)<br />
*[http://apod.nasa.gov/apod/ap110226.html Shell Galaxies in Pisces]{{Wayback|url=http://apod.nasa.gov/apod/ap110226.html |date=20110227194359 }}, NASA Astronomy Picture of the Day (27 February 2011)<br />
*[https://apod.nasa.gov/apod/ap140105.html Galaxy NGC 474: Shells and Star Streams]{{Wayback|url=https://apod.nasa.gov/apod/ap140105.html |date=20180303144049 }}, NASA Astronomy Picture of the Day (5 January 2014)<br />
*[https://apod.nasa.gov/apod/ap180206.html Galaxy NGC 474: Shells and Star Streams]{{Wayback|url=https://apod.nasa.gov/apod/ap180206.html |date=20180303144505 }}, NASA Astronomy Picture of the Day (6 February 2018)<br />
<br />
{{Catalogs | NGC = 474| Arp = 227|UGC = 864| PGC = 4801}}<br />
{{Ngc5}}<br />
<br />
{{DEFAULTSORT:NGC 0474}}<br />
[[Category:透鏡狀星系]]<br />
[[Category:雙魚座NGC天體|0474]]<br />
[[Category:UGC天體|0864]]<br />
[[Category:PGC天體|4801]]<br />
[[Category:1784年發現的天體|17841223]]<br />
[[Category:阿普天體|227]]<br />
{{galaxy-stub}}</div>
imported>InternetArchiveBot