| 词条 | NGC 227 |
| 释义 |
| name = NGC 227 | image = NGC227 - SDSS DR14.jpg | caption = SDSS image of NGC 227 | epoch = J2000 | ra = {{RA|00|42|36.8}}[1] | dec = {{DEC|-01|31|44}}[1] | constellation name = Cetus | z = 0.017669[1] | dist_ly =237 Mly[2] | type = S0[1] | appmag_v = 13.11[1] | size_v = 1.6' × 1.3'[1] | notes = | names = UGC 456, CGCG 383-076, MCG +00-02-135, 2MASX J00423684-0131436, 2MASXi J0042365-013137, 6dF J0042367-013144, PGC 2547.[1] }}NGC 227 is a lenticular galaxy located approximately 237 million light-years from the Sun[2] in the constellation Cetus. It was discovered on October 1, 1785 by William Herschel.[3] See also
References1. ^1 2 3 4 5 6 {{cite web | title=NASA/IPAC Extragalactic Database | work=Results for NGC 0227 | url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+227&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 | accessdate=2016-09-02}} 2. ^1 An object's distance from Earth can be determinded using Hubble's law: v=Ho is Hubble's constant (70±5 (km/s)/Mpc). The relative uncertainty Δd/d divided by the distance is equal to the sum of the relative uncertainties of the velocity and v=Ho 3. ^{{cite web|title=New General Catalog Objects: NGC 200 - 249|url=http://cseligman.com/text/atlas/ngc2.htm#227|publisher=Cseligman|accessdate=September 15, 2016}} External links
6 : NGC objects|Principal Galaxies Catalogue objects|Lenticular galaxies|Cetus (constellation)|Astronomical objects discovered in 1785|Discoveries by William Herschel |
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