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 Hubble 1925. It includes areas of bright H II[1] emission. It is located north-west of the larger Hubble 1925 III.
| 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] |
| Distance | 1.63 ± 0.03 Mly (500 ± 10 kpc)[2][3][4] ly |
| Apparent magnitude (V) | 15[1] |
| Apparent dimensions (V) | 48″ × 32″ |
| Constellation | Sagittarius |
| Physical characteristics | |
| Radius | ~379 ly (116.3 pc) (estimated)[2][3][4] ly |
| Designations | Hubble 1925 I, Hubble I,[1] MCG -02-50-002,[1] |
See also
Notes
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, vol. 652, no. 2, pp. 1170–1187, arXiv:astro-ph/0608249, Bibcode:2006ApJ...652.1170C, doi:10.1086/508341, S2CID 10287455
- Hubble, Edwin P. (December 1925), "NGC 6822, a remote stellar system", Astrophysical Journal, vol. 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, vol. 127, no. 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, vol. 49, no. 1, pp. 3–18, Bibcode:2006Ap.....49....3K, doi:10.1007/s10511-006-0002-6, S2CID 120973010
- NED (February 24, 2007), Results for search on MCG -02-50-002
External links
- NGC 6822 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images