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.
Emission nebula | |
---|---|
H II region | |
Observation data: J2000.0 epoch | |
Right ascension | 19h 44m 36s |
Declination | −14° 41′ 42″ |
Distance | 1.63 million ly (0.500 Mpc pc) |
Apparent magnitude (V) | ~14.5 |
Apparent dimensions (V) | 53″ |
Constellation | Sagittarius |
Physical characteristics | |
Radius | ~419 ly (128.4 pc) (estimated) ly |
Designations | 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 |
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.
In 1987 this object Hubble III in NGC 6822, was observed with the Manchester Echelle Spectrometer II.[1]