| 词条 | Ring Nebula (NGC 6822) |
| 释义 |
| name = Ring Nebula in Barnard's Galaxy | image = NGC 6822 Bubble and Ring nebulae.jpg | caption = The Ring Nebula (lower right) seen with the Bubble Nebula (upper left) | type = H II region | subtype= | epoch = J2000.0 | ra = 19h 44m 36s | dec = -14° 41′ 42″ | dist_ly = 1.63 million ly | dist_pc = 0.500 Mpc | appmag_v = ~14.5 | size_v = 53″ | constellation = Sagittarius | radius_ly = | absmag_v = | notes = | names = Hubble 1925 III, Hodge 4, NGC 6822B, NGC 6822-2, IRAS 19421-1455, DDO 209, LEDA 63616, HIPASS J1944-14, 2MASX J19445619-1447512, IC 4895, MCG-02-50-006 }} The Ring Nebula in Barnard's Galaxy has the official designation of Hubble 1925 III as it was the third (Roman numeral 3) object recorded in Hubble's 1925 paper, N.G.C. 6822, A Remote Stellar System. It includes areas of bright H II emission. In Paul W. Hodge's 1977 paper it was designated Hodge 4. Its appearance is very similar to the filamentary nebula found in the Large Magellanic Cloud (see Meaburn 1981). It most resembles the circular ring-like nebula N70 in the LMC. See also
External links
3 : H II regions|Sagittarius (constellation)|NGC 6822 |
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