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 E. Hubble 1925. It includes areas of bright H II[1] emission. It is located north-west of the larger Hubble 1925 III.

Bubble Nebula in Barnard's Galaxy
Emission nebula
H II region
The Bubble Nebula (upper left) seen with the Ring Nebula (lower right)
Observation data: J2000 epoch
Right ascension 19h 44m 31.8s[1]
Declination−14° 41′ 57″[1]
Distance1.63 ± 0.03 Mly (500 ± 10 kpc)[2][3][4] ly
Apparent magnitude (V)15[1]
Apparent dimensions (V)48″ × 32″
ConstellationSagittarius
Physical characteristics
Radius~379 ly (116.3 pc) (estimated)[2][3][4] ly
DesignationsHubble 1925 I, Hubble I,[1]

MCG -02-50-002,[1]

IRAS 19417-1449,[1] Hodge 2, PGC 63596

See also

Notes
  1. NED 2007
  2. Karachentsev et al. 2004
  3. Karachentsev & Kashibadze 2006
  4. Cannon et al. 2006

References
  • Cannon, John M.; Walter, Fabian; Armus, Lee; Bendo, George J.; Calzetti, Daniela; Draine, Bruce T.; Engelbracht, Charles W.; Helou, George; et al. (December 2006), "The Nature of Infrared Emission in the Local Group Dwarf Galaxy NGC 6822 as Revealed by Spitzer", The Astrophysical Journal, 652 (2), pp. 1170–1187, arXiv:astro-ph/0608249, Bibcode:2006ApJ...652.1170C, doi:10.1086/508341
  • Hubble, Edwin P. (December 1925), "NGC 6822, a remote stellar system", Astrophysical Journal, 62, pp. 409–433, Bibcode:1925ApJ....62..409H, doi:10.1086/142943
  • Karachentsev, I. D.; Karachentseva, V. E.; Hutchmeier, W. K.; Makarov, D. I. (April 2004), "A Catalog of Neighboring Galaxies", Astronomical Journal, 127 (4), pp. 2031–2068, Bibcode:2004AJ....127.2031K, doi:10.1086/382905
  • Karachentsev, I. D.; Kashibadze, O. G. (January 2006), "Masses of the local group and of the M81 group estimated from distortions in the local velocity field", Astrophysics, 49 (1), pp. 3–18, Bibcode:2006Ap.....49....3K, doi:10.1007/s10511-006-0002-6
  • NED (February 24, 2007), Results for search on MCG -02-50-002


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