NGC 7822
| Emission nebula | |
|---|---|
 Ced 214 and NGC 7822, Sh2-170 at bottom | |
| Observation data: J2000 epoch | |
| Right ascension | 00h 01m 08.58s[1] |
| Declination | +67° 25′ 17.0″[1] |
| Distance | 2900 ly (900[1] pc) |
| Apparent diameter | 100′[2] |
| Constellation | Cepheus |
| Physical characteristics | |
| Radius | 75[3] ly (23 pc) |
| Designations | LBN 589, Sh 2-171[4] |
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 45,000 K and a luminosity about 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]
Sharpless 2-170, or the Little Rosette Nebula. is located nearby. The two nebulae are not related, with NGC 7822 being about 4,600 Light Years away from each other.[9]
Gallery
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NGC 7822 by Sterling Tresierra -
Amateur image of NGC 7822 by Jeff Johnson -
Amateur RGB image taken with a DSLR and 5" apochromatic refractor
References
[edit | edit source]- ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d 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, Journal of the American Association of Variable Star Observers, vol. 36, no. 1, p. 90
- ^ a b Pandey et al.(2008).Stellar contents and star formation in the young star cluster Be 59, MNRAS, Volume 383, Issue 3, pp. 1241–1258
- ^ 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
- ^ Fernandez, Antonio (2008). Sharpless 171, APOD, October 18, 2008
- ^ https://www.aapod2.com/blog/Little-rosette-nebula
External links
[edit | edit source]- Error creating thumbnail: File missing Media related to Lua error in Module:Commons_link at line 62: attempt to index field 'wikibase' (a nil value). at Wikimedia Commons
- NASA Astronomy Picture of the Day: NGC 7822 in Cepheus (16 November 2011)
