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NGC 4845 - 版本历史
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<p><b>新页面</b></p><div>{{Infobox galaxy<br />
| name = [[New General Catalogue|NGC]] 4845<br />
| image =[[File:Ngc4845-hst-606R814GB450.jpg|275px|NGC 4845]]<br />
| caption = NGC 4845的明亮核心中<br />
| epoch = [[J2000]]<br />
| type = Sab<ref name=DSO/><br />
| ra = {{RA|12|58|01.2}}<ref name=NED/><br />
| dec = {{DEC|1|34|33}}<br />
| dist_ly = 47 [[光年|Mly]]<br />
| z = z=0.004110 (1232 km/[[秒|s]])<ref name=NED>{{cite web|url=http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+4845&extend=no|title=NCG 4845|publisher=NASA/IPAC Extragalactic Database|accessdate=2016-03-27|archive-date=2019-02-17|archive-url=https://web.archive.org/web/20190217083557/http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+4845&extend=no|dead-url=no}}</ref><br />
| appmag_v = 11.2<ref name=DSO>{{cite web|url=http://dso-browser.com/dso/info/NGC/4845|title=NCG 4845|publisher=Deep Sky Observatory|accessdate=2016-03-27|archive-date=2015-02-24|archive-url=https://web.archive.org/web/20150224033641/http://dso-browser.com/dso/info/NGC/4845|dead-url=no}}</ref><br />
| size_v = 4&prime;.9 &times; 1&prime;.3<ref name=DSO/><br />
| constellation name = [[室女座]]<br />
| notes =<br />
| names = UGC 08087, 2MASX J12580124+0134320, NGC 4910<ref>{{cite web|url=http://www.ngcicproject.org/ngcicdb.asp|title=NGC 4910|publisher=The NGC/IC Project|accessdate=May 13, 2013|deadurl=yes|archiveurl=https://web.archive.org/web/20120520010558/http://www.ngcicproject.org/ngcicdb.asp|archivedate=2012年5月20日}}</ref> <br />
}}<br />
<br />
'''NGC 4845'''，或稱為'''NGC 4910'''，是一個距離地球約4700萬光年的[[螺旋星系]]，在天球上位於[[室女座]]。該星系由[[威廉·赫歇爾]]發現於1786年<ref>{{cite web|url=http://cseligman.com/text/atlas/ngc48.htm#4845|title=NGC Objects: NGC 4800-4849|publisher=Courtney Seligman|accessdate=May 13, 2013|archive-date=2019-02-20|archive-url=https://web.archive.org/web/20190220072201/http://cseligman.com/text/atlas/ngc48.htm#4845|dead-url=yes}}</ref>。<br />
<br />
NGC 4845的中心有個質量為300,000[[太陽質量|<math>\begin{smallmatrix}M_\odot\end{smallmatrix}</math>]]的[[超大質量黑洞]]。2013年，[[歐洲太空總署]]的[[国际伽玛射线天体物理实验室]]（INTEGRAL）觀測到了該黑洞可能正在吞噬周圍可能是[[棕矮星]]等低質量天體時發射出的X射線閃焰<ref>{{cite web|url=http://news.nationalpost.com/2013/04/04/astronomers-watch-as-supermassive-black-hole-wakes-up-swallows-planet-whole/|title=Astronomers watch as supermassive black hole ‘wakes up,’ swallows planet whole|publisher=National Post|date=April 4, 2013|accessdate=May 13, 2013|archive-date=2014-12-31|archive-url=https://web.archive.org/web/20141231210928/http://news.nationalpost.com/2013/04/04/astronomers-watch-as-supermassive-black-hole-wakes-up-swallows-planet-whole/|dead-url=no}}</ref><ref>{{cite web|url=http://www.geekosystem.com/ngc-4845-black-hole-eats-planet/|title=Watch a Black Hole Feed on Its Planet-Sized Prey|author=Jeff LaSala|publisher=Geekosystem|date=April 3, 2013|accessdate=May 13, 2013|archive-date=2014-01-28|archive-url=https://web.archive.org/web/20140128021143/http://www.geekosystem.com/ngc-4845-black-hole-eats-planet/|dead-url=no}}</ref><ref>{{cite web|title=Supermassive and super-hungry|url=http://www.spacetelescope.org/images/potw1601a/|accessdate=4 January 2016|archive-date=2016-03-15|archive-url=https://web.archive.org/web/20160315162521/http://www.spacetelescope.org/images/potw1601a/|dead-url=no}}</ref>。<br />
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==參考資料==<br />
{{Reflist}}<br />
<br />
==外部連結==<br />
{{Commons category}}<br />
* {{WikiSky}}<br />
<br />
{{Catalogs|NGC=4845}}<br />
{{Ngc50}}<br />
<br />
{{DEFAULTSORT:NGC 4845}}<br />
[[Category:室女座NGC天體|4845]]<br />
[[Category:UGC天體|08087]]<br />
[[Category:螺旋星系]]<br />
{{galaxy-stub}}</div>
imported>InternetArchiveBot