Sadr (γ Cyg) and part of IC 1318 in Cygnus

© Velimir Popov & Emil Ivanov 2016
Size: 2000 px

Gamma Cygni (known by the proper name Sadr) is a supergiant star at the center of the constellation Cygnus. This image shows a big part of an emission nebula, known as IC 1318 (or Sh2-108, or Gamma Cygni nebula), and surrounding this 2.2 mag. star. Left of Gamma Cygni is the young, tightly grouped open cluster NGC 6910. Some dust clouds and glowing nebulae, making the entire nebulosity complex of IC 1318 are catalogued also in Lynds catalogues (see the mouseover annotation). The distance to Gamma Cygni is estimated to be about 1800 light-years, while estimates for IC 1318 and NGC 6910 range from 2,000 to 5,000 light-years.


Image details:


Center of field RA 20:25:37 (h:m:s)
Center of field DE +40:12:47 (deg:m:s)
Size 1.75 x 1.28 (deg)
Pixel scale: 1.04 (arcsec/pixel)
Orientation: Up is 109 degrees E of N
Charts and image details obtained from
Optic(s): ASA 12" Astrograph @ f/3.6 (Newton)
Mount: ASA DDM85 Standard
Camera: SBIG STL 11000 M
Filters: Luminance, Red, Green, Blue, Astronomik filters
Dates/Times: Aug 2015
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: L:4x10min.,R:4x10min, G:4x10min, B:4x10min Bin 1, Total 160 min (2:40 hrs)
More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2016. All Rights Reserved
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