Sh 2-115
| Nebula | |
|---|---|
.jpg) Image of Sh 2-115 Nebula | |
| Observation data: epoch | |
| Right ascension | 20h 35m 2.00s |
| Declination | +47° 02′ 24.0″ |
| Distance | 3000 ± 600 pc |
| Constellation | Cygnus |
| Designations | Sh 2-115, LBN 357, 3C 416.1[1] |
Sh 2-115 is an emission nebula and H II region in the constellation of Cygnus, catalogued by Stewart Sharpless in his 1959 second edition of H II regions visible from the northern hemisphere. It lies approximately 2–2.5° northwest of the bright star Deneb (α Cygni) and is part of the extensive star-forming complexes in the Orion Arm of the Milky Way.[2][3][4][5]
The primary source ionizing the nebula is the open cluster named Berkeley 90[6] located in the eastern part of the nebula, and the star responsible for ionization is O-type star LS III +46 12 (O4.5IV(f)). Three other stars named DM 46 2972 (O9.5 V), DM 46 2978 (B0III) and LS III 46 12 (O6) are also suspected to be involved in the ionization.[7][2][1][8][9]
References
[edit]- ^ a b "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-11-29.
- ^ a b "Sh 2-115". galaxymap.org. Retrieved 2025-11-29.
- ^ "SH2-115 and Abell 71 - 4.0 hours in SHO". Cosgrove's Cosmos. Retrieved 2025-11-29.
- ^ "Sh2-115 & Sh2-116". AAPOD2.COM. Retrieved 2025-11-29.
- ^ "SH2-115". AstroKin. Retrieved 2025-11-29.
- ^ "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-11-29.
- ^ "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-11-29.
- ^ Felli, M.; Harten, R. H. (July 1981). "A high-resolution search for small-scale structure in Sharpless H II regions at 4.995 GHz". Astronomy and Astrophysics. 100. ISSN 0004-6361. Archived from the original on 2025-04-06. Retrieved 2026-02-11.
- ^ Avedisova, V. S.; Kondratenko, G. I. (1984). "Exciting stars and the distances of the diffuse nebulae". Nauchnye Informatsii. 56. ISSN 0130-9773. Archived from the original on 2025-02-20. Retrieved 2025-11-29.
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