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NGC 488 - 版本历史
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<p><b>新页面</b></p><div>{{Infobox galaxy<br />
| name = [[New General Catalogue|NGC]] 488<br />
| image = [[Image:N488s.jpg|280px]]<br />
| caption =[[萊蒙山天文台]] 所攝之 NGC 488<br />
| credit = [[NASA]]/STScI/WikiSky<br />
| epoch = [[J2000]]<br />
| type = SA(r)b<ref name="ned">{{cite web<br />
| title=NASA/IPAC Extragalactic Database<br />
| work=Results for NGC 488<br />
| url=http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+488<br />
| accessdate=2006-11-18<br />
| archive-date=2019-02-17<br />
| archive-url=https://web.archive.org/web/20190217083622/http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+488<br />
| dead-url=no<br />
}}</ref><br />
| ra = {{RA|01|21|46.8}}<ref name="ned" /><br />
| dec = {{DEC|+15|24|19}}<ref name="ned" /><br />
| dist_ly = 98.3 ± 3.9 [[光年|Mly]] (30.15 ± 1.2 [[百萬秒差距|Mpc]])<ref name="ned" /><br />
| z = 2272 ± 1 [[kilometer|km]]/[[second|s]]<ref name="ned" /><br />
| appmag_v = 10.4<br />
| size_v = 5′.4 × 3′.9<ref name="ned" /><br />
| constellation name = [[雙魚座]]<br />
| notes = 緊緊卷繞在一起的旋臂<br />
| names = [[Uppsala General Catalogue|UGC]] 907, PGC 4946<ref name="ned" />, MCG 1-4-33,ZWG 411.33<br />
}}<br />
'''NGC 488''' 是[[雙魚座]]的一個盤面面向地球的[[螺旋星系]]，距離地球約9000萬光年<ref>[http://www.ing.iac.es/PR/science/galaxies.html#ngc488 NGC 488 Galaxy] {{Wayback|url=http://www.ing.iac.es/PR/science/galaxies.html#ngc488 |date=20160604051103 }} Galaxies and Clusters of Galaxies, Isaac Newton Group of Telescopes</ref>，直徑52.6[[秒差距|Kpc]]（171000光年）<ref name="ned" />。NGC 488有一個巨大的中央[[核球 (星系)|核球]]存在，被認為是多旋臂星系的原型星系。它的旋臂分布相當緊密，並且天文學家觀測該星系的恆星形成狀況已經深入旋臂內部<ref name=Carnegie>Sandage, A., Bedke, J. (1994), ''The Carnegie Atlas of Galaxies. Volume I'', Carnegie Institution of Washington, p. 15</ref>。NGC 488的核心有化學退耦現象，並且該區域恆星的[[金屬量]]是核球其他區域的2倍。鄰近NGC 488的較小伴星系組成了NGC 488星系群，但NGC 488卻是孤立星系<ref>{{cite journal|last1=Sil'chenko, O. K.|title=Chemically decoupled nucleus and the structure of the nuclear region in the spiral galaxy NGC 488|journal=Astronomy Letters|date=March 1999|volume=25|issue=3|pages=140–8|url=http://cdsads.u-strasbg.fr/abs/1999AstL...25..140S|accessdate=29 December 2015|archive-date=2019-12-07|archive-url=https://web.archive.org/web/20191207174130/http://cdsads.u-strasbg.fr/abs/1999AstL...25..140S|dead-url=no}}</ref>。<br />
<br />
NGC 488由[[威廉·赫歇爾]]於1784年12月13日發現。該星系內曾經觀測到兩顆超新星，分別是可能為Ia型的{{link-pl|SN 2010eb|SN 2010eb}}，最大亮度14.7等；以及最大亮度15等的SN 1976G<ref>[http://www.cbat.eps.harvard.edu/lists/Supernovae.html List of Supernovae] {{Wayback|url=http://www.cbat.eps.harvard.edu/lists/Supernovae.html |date=20101112022554 }} ''[[IAU]] Central Bureau for Astronomical Telegrams''. Retrieved 29 December 2015.</ref>。<br />
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== 參考資料 ==<br />
{{reflist}}<br />
<br />
{{NGCReference|488}}<br />
{{Catalogs|NGC=488}}<br />
<br />
{{Galaxy-stub}}<br />
[[Category:無棒螺旋星系]]<br />
[[Category:雙魚座NGC天體|488]]<br />
[[Category:UGC天體|00907]]<br />
[[Category:PGC天體|04946]]</div>
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