| 词条 | NGC 7012 |
| 释义 |
| name = NGC 7012 | image = NGC 7012 close up with 5 Galaxies.jpg | image_size = 250px | caption = In this picture by the 2MASS survey, NGC 7012 is surrounded by 3 smaller galaxies. The star TYC 7977-850-1 is also visible at the lower right. | epoch = J2000 | type = E4 pec[1] | ra = {{RA|21|06|45.5}}[1] | dec = {{DEC|-44|48|53}}[1] | dist_ly = 381,654,000 ly | z = 0.029347/8798 km/s[1] | appmag_v = 13.65[1] | size_v =2.5 x 1.4[1] | constellation name= Microscopium | names = ESO 286-51, AM 2103-450, PGC 66116[1] }}NGC 7012 is a large, bright[8] elliptical galaxy located about 380 million Light-years away from Earth in the constellation Microscopium[2][3] NGC 7012 was discovered by astronomer John Herschel on July 1, 1834.[4] Abell S0921NGC 7012 is the brightest member in the center of a small compact group of interacting galaxies[5] known as Abell S0921.[6] Due to it also being the dominant member of the group, NGC 7012 is classified as a Cd galaxy.[7] The group has about seven major galaxies with many other more distant, fainter galaxies that are probably also associated.[8] See also
External links{{WikiSky}}References1. ^1 2 3 4 5 6 {{cite web | title=NASA/IPAC Extragalactic Database | work=Results for NGC 7012 | url=http://nedwww.ipac.caltech.edu/ | accessdate=2017-05-13 }} 2. ^{{Cite web|url=https://dso-browser.com/deep-sky/8199/ngc-7012/galaxy|title=Galaxy NGC 7012 Deep Sky Objects Browser|last=Rojas|first=Sebastián García|date=|website=DSO Browser|language=en|archive-url=|archive-date=|dead-url=|access-date=2017-05-11}} 3. ^{{Cite web|url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+7012&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|last=|first=|date=|website=ned.ipac.caltech.edu|archive-url=|archive-date=|dead-url=|access-date=2017-05-13}} 4. ^{{Cite web|url=http://cseligman.com/text/atlas/ngc70.htm|title=New General Catalog Objects: NGC 7000 - 7049|website=cseligman.com|language=en-US|access-date=2017-05-08}} 5. ^{{Cite simbad|title=ACO S 921|access-date=2017-05-18}} 6. ^{{Cite web|url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=ACO+S921&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=2017-09-10}} 7. ^{{Cite web|url=http://ned.ipac.caltech.edu/cgi-bin/NEDatt?objname=NGC+7012|title=Detailed Object Classifications|website=ned.ipac.caltech.edu|access-date=2017-11-14}} 8. ^1 {{Cite web|url=http://www.ngcicproject.org/NGC/NGC_70xx/NGC_7012.htm|title=NGC/IC Project Restoration Efforts|website=www.ngcicproject.org|access-date=2017-05-13}} 5 : Astronomical objects discovered in 1834|Microscopium|NGC objects|Elliptical galaxies|Principal Galaxies Catalogue objects |
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