| 词条 | NGC 4531 |
| 释义 |
| name = NGC 4531 | image = SDSS NGC 4531.jpg | image_size = 250px | caption = SDSS image of NGC 4531. | epoch = J2000 | type = SB0^+[1] | ra = {{RA|12|34|15.9}}[1] | dec = {{DEC|13|04|31}}[1] | dist_ly = 49.55 Mly[2] | group_cluster = Virgo Cluster | z = 0.000650/195 km/s[1] | appmag_v = 12.42[1] | size_v = 3.1 x 2.0[1] | constellation name = Virgo | names = PGC 41806, UGC 7729, VCC 1552 [1] |size=~50,270 ly (estimated)[1]}}NGC 4531 is a spiral galaxy located about 50 million light-years away[3] in the constellation Virgo.[4] It was discovered by astronomer William Herschel on April 17, 1784.[5] NGC 4531 is member of the Virgo Cluster.[6][7] See also
References1. ^1 2 3 4 5 6 7 {{cite web | title=NASA/IPAC Extragalactic Database | work=Results for NGC 4531 | url=http://nedwww.ipac.caltech.edu/ | accessdate=2017-11-25}} 2. ^{{cite web| title = parsecs to lightyears conversion| url = http://www.unitconversion.org/length/parsecs-to-light-years-conversion.html| accessdate = 2017-09-30}} 3. ^{{Cite web|url=https://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+4531&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=2017-11-26}} 4. ^{{Cite web|url=http://spider.seds.org/ngc/revngcic.cgi?NGC4531|title=Revised NGC Data for NGC 4531|website=spider.seds.org|access-date=2017-11-26}} 5. ^{{Cite web|url=http://cseligman.com/text/atlas/ngc45.htm#4531|title=New General Catalog Objects: NGC 4500 - 4549|last=|first=|date=|website=cseligman.com|archive-url=|archive-date=|dead-url=|access-date=2017-11-08}} 6. ^{{Cite web|url=http://www.atlasoftheuniverse.com/galgrps/vir.html|title=The Virgo Cluster|website=www.atlasoftheuniverse.com|access-date=2017-11-21}} 7. ^{{Cite web|url=https://ned.ipac.caltech.edu/cgi-bin/NEDatt?objname=NGC+4531|title=Detailed Object Classifications|website=ned.ipac.caltech.edu|access-date=2017-11-26}} External links{{WikiSky}}{{Ngc50}}{{galaxy-stub}} 8 : Virgo (constellation)|Spiral galaxies|NGC objects|Principal Galaxies Catalogue objects|UGC objects|Astronomical objects discovered in 1784|Virgo Cluster|Discoveries by William Herschel |
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