| 词条 | NGC 4489 |
| 释义 |
| name = NGC 4489 | image = SDSS NGC 4489.jpg | image_size = 250px | caption= The elliptical galaxy NGC 4489. | epoch = J2000 | type =E [1] | ra = {{RA|12|30|52.2}}[1] | dec = {{DEC|16|45|32}}[1] | dist_ly = 57 Mly | group_cluster = Virgo Cluster | z = 0.003206/961 km/s[1] | appmag_v = 12.84 [1] | size_v = 1.7 x 1.5[1] | constellation name = Coma Berenices | names = CGCG 99-73, MCG 3-32-54, PGC 41365, UGC 7655, VCC 1321[1] |size=~26,000 ly}}NGC 4489 is a dwarf elliptical galaxy[2] located about 60 million light-years away[3] in the constellation of Coma Berenices.[4] It was discovered by astronomer William Herschel on March 21, 1784.[5] NGC 4489 is a member of the Virgo Cluster.[6] See also
External links{{WikiSky}}References1. ^1 2 3 4 5 6 {{cite web | title=NASA/IPAC Extragalactic Database | work=Results for NGC 4489 | url=http://nedwww.ipac.caltech.edu/ | accessdate=2017-08-11}} {{Ngc45}}2. ^{{Cite journal|last=Mei|first=S.|last2=Silva|first2=D. R.|last3=Quinn|first3=P. J.|date=30 October 2000|title=Anomalous surface brightness fluctuations in NGC 4489⋆|url=https://www.aanda.org/articles/aa/pdf/2001/04/aa9665.pdf|journal=Astronomy & Astrophysics|volume=366|pages=54–61|via=|doi=10.1051/0004-6361:20000080}} 3. ^{{Cite web|url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+4489&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|title=Your NED Search Results|website=ned.ipac.caltech.edu|access-date=2017-08-11}} 4. ^{{Cite web|url=https://dso-browser.com/deep-sky/5537/ngc-4489/galaxy|title=Galaxy NGC 4489 - Galaxy in Coma Berenices Constellation · Deep Sky Objects Browser|last=Rojas|first=Sebastián García|website=DSO Browser|language=en|access-date=2017-08-11}} 5. ^{{Cite web|url=http://cseligman.com/text/atlas/ngc44a.htm#4457|title=New General Catalog Objects: NGC 4450 - 4499|website=cseligman.com|language=en-US|access-date=2017-08-01}} 6. ^{{Cite web|url=http://ned.ipac.caltech.edu/cgi-bin/NEDatt?objname=NGC+4489|title=Detailed Object Classifications|website=ned.ipac.caltech.edu|access-date=2017-08-11}} 7 : Dwarf elliptical galaxies|Coma Berenices (constellation)|NGC objects|Virgo Cluster|Principal Galaxies Catalogue objects|UGC objects|Astronomical objects discovered in 1784 |
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