NGC 7822

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NGC 7822
Emission nebula
Cederblad 214 and NGC 7822 Nebulae - Davidedemartin 6.jpg
Ced 214 and NGC 7822
Observation data: J2000 epoch
Right ascension00h 01m 08.58s[1]
Declination+67° 25′ 17.0″[1]
Distance2900 ly   (900[1] pc)
Apparent diameter100′[2]
Physical characteristics
Radius150[3] ly   (46 pc)
DesignationsLBN 589, Sh 2-171[4]
See also: Lists of nebulae

NGC 7822 is a young star forming complex in the constellation of Cepheus. The complex encompasses the emission region designated Sharpless 171, and the young cluster of stars named Berkeley 59. The complex is believed to be some 800-1000 pc distant,[5][6] with the younger components aged no more than a few million years.[5][6] The complex also includes one of the hottest stars discovered within 1 kpc of the Sun, namely BD+66 1673, which is an eclipsing binary system consisting of an O5V that exhibits a surface temperature of nearly 45000 K and a luminosity ~100,000 times that of the Sun.[5] The star is one of the primary sources illuminating the nebula and shaping the complex's famed pillars of creation-type formations, the elephant trunks.[5][7][8]


  1. 1.0 1.1 1.2 Quireza, Cintia; Rood, Robert T.; Bania, T. M.; Balser, Dana S.; MacIel, Walter J. (2006). "The Electron Temperature Gradient in the Galactic Disk". The Astrophysical Journal 653 (2): 1226. arXiv:astro-ph/0609006. Bibcode 2006ApJ...653.1226Q. doi:10.1086/508803.
  2. Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  3. Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  4. Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  5. 5.0 5.1 5.2 5.3 Majaess D., Turner D., Lane D., Moncrieff K. (2008). The Exciting Star of the Berkeley 59/Cepheus OB4 Complex and Other Chance Variable Star Discoveries, JAAVSO, vol. 36, no. 1, p. 90
  6. 6.0 6.1 Pandey et al.(2008).Stellar contents and star formation in the young star cluster Be 59, MNRAS, Volume 383, Issue 3, pp. 1241-1258
  7. Gahm G. F., Carlqvist P., Johansson L. E. B., Nikolić S. (2008). Rotating elephant trunks, Astronomy and Astrophysics, Volume 454, Issue 1, July IV 2006, pp.201-212
  8. Fernandez, Antonio (2008). Sharpless 171, APOD, October 18, 2008

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Amateur image (south at top)

External links[edit]

Amateur RGB image taken with a DSLR and 5" apochromatic refractor

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