Veil East (NGC 6992)

Click on the image for high res version. MOUSE OVER for H-alpha only. Look also to the OIII only hires and H-alpha only hires.

Veil East is the most interesting and complex part of the Veil nebula in Cygnus. It is catalogued as NGC 6992 (left part) and NGC 6995 (right part). This image goes very deep in H-alpha and OIII light, showing very thin and faint parts. Take a look at the hires version, to the animation and cropped zoom below.

Technical Data
Optics TEC 140
Focal Length
1011 mm
Focal Ratio f/7.2
Exposure Time Total 9 h, composed of OIII-Ha-RGB 240:150:40:30:50 min (single exp of 30 min for OIII and Ha, and 10 min for RGB)
CCD SBIG STL-11000M @-30C
Location Saint Barthelemy, Passet field (AO, Italian Alps) at 1962 m height
10-11 August 2018 (2 nights)
Mount Gemini G-41
Tracking Lodestar on an 80mm f/5 refractor
Temperature and humidity T= (+10 to +6) C, RH=(40 to 90) %
Sky brightness at zenith (with SQM-L) (21.4 to 21.7) mag/arcsec^2
Notes The first night was perfectly clear and extremely dark, while about 50% of the second night was clouded.

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