The Ring Nebula in
Barnard's Galaxy
NGC 6822 (also known as Barnard's Galaxy, IC 4895, or Caldwell 57) is a barred irregular galaxy approximately 1.6 million light-years away in the constellation Sagittarius. Part of the Local Group of galaxies, it was discovered by E. E. Barn ...
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
An H II region or HII region is a region of interstellar atomic hydrogen that is ionized. It is typically in a molecular cloud of partially ionized gas in which star formation has recently taken place, with a size ranging from one to hundred ...
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
The Large Magellanic Cloud (LMC), or Nubecula Major, is a satellite galaxy of the Milky Way. At a distance of around 50 kiloparsecs (≈160,000 light-years), the LMC is the second- or third-closest galaxy to the Milky Way, after the ...
(see Meaburn 1981). It most resembles the circular ring-like nebula N70 in the LMC.
In 1987 this object Hubble III in
NGC 6822
NGC 6822 (also known as Barnard's Galaxy, IC 4895, or Caldwell 57) is a barred irregular galaxy approximately 1.6 million light-years away in the constellation Sagittarius. Part of the Local Group of galaxies, it was discovered by E. E. Barnard ...
, was observed with the Manchester Echelle Spectrometer II.
See also
*
Bubble Nebula (NGC 6822)
The Bubble Nebula in Barnard's Galaxy has the official designation of Hubble 1925 I as it was the first (Roman numeral 1) object recorded in a paper by . It includes areas of bright H II region, H II emission. It is located north-west of th ...
*
NGC 6822
NGC 6822 (also known as Barnard's Galaxy, IC 4895, or Caldwell 57) is a barred irregular galaxy approximately 1.6 million light-years away in the constellation Sagittarius. Part of the Local Group of galaxies, it was discovered by E. E. Barnard ...
References
External links
Simbad* Clayton, C.A.
The Dynamics of the giant ring nebula Hubble III in NGC 6822, ''
Monthly Notices of the Royal Astronomical Society
''Monthly Notices of the Royal Astronomical Society'' (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics. It has been in continuous existence since 1827 and publishes letters and papers reporting orig ...
'', vol. 226, May 15, 1987, p. 493-504
H II regions
Sagittarius (constellation)
NGC 6822
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