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Contains:  The star 32Cyg
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Omicron-2 Cygni, LBN 331, DWB 177,178,179 , 


            Antonio F. Sánchez
Omicron-2 Cygni, LBN 331, DWB 177,178,179

Technical card

Resolution: 2393x1800

Dates:Aug. 8, 2015Aug. 10, 2015Aug. 14, 2015Aug. 16, 2015

Optec 50mm B: 29x480" -25C bin 1x1
Optec 50mm G: 27x480" -25C bin 1x1
Optec 50mm L: 70x360" -25C bin 1x1
Optec 50mm R: 30x480" -25C bin 1x1

Integration: 18.5 hours

Avg. Moon age: 20.09 days

Avg. Moon phase: 13.56%

Bortle Dark-Sky Scale: 2.00 job: 744373

RA center: 20h 17' 19"

DEC center: +47° 42' 36"

Pixel scale: 1.425 arcsec/pixel

Orientation: -177.969 degrees

Field radius: 0.593


This image is dominated by the emission nebula known as LBN 331. The bright star central in the image is 32 Cygni. 32 Cygni is a binary star system (32 Cygni A and B). The

orbital plane of the two stars is nearly aligned with the line of sight to Earth. This alignment from Earth's viewpoint becomes an eclipsing variable star system known as

V1488 Cyg (1147 day cycle). This emission nebula lies (visually) in a dense star region of the Milky Way. This field is also well represented in the DWB catalog - the brighter

filaments of LBN 331 also have the DWB designations of DWB 179, 178, 177. (Credits: Jim Thommes)

Omicron-2 Cygni is an orange supergiant star in the constellation Cygnus. At 1,040 light years away, it is the 498th brightest star in the Earth's sky, where it shines at an

apparent visual magnitude of 3.96. Omicron-2 Cygni is the primary component of a multiple-star system. The iron abundance of Omicron-2 Cygni is -0.33 (46.8% of the Sun). It is

moving through the Galaxy at a speed of 10.2 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,000 and 28,000 light years from the center of the


Common designations: Omicron-2 Cygni, 32 Cygni, HIP 99848, HD 192909, HR 7751

(Credits: James. B. Kaler. Illinois University).



Antonio F. Sánchez
License: None (All rights reserved)

Sky plot

Sky plot


Omicron-2 Cygni, LBN 331, DWB 177,178,179 , 


            Antonio F. Sánchez