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Contains:  NGC 6910, gamma Cyg nebula, IC 1318, The star Sadr (γCyg)
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Sadr and Nebulosity in Cygnus, 


            Stephen Migol
Sadr and Nebulosity in Cygnus

Sadr and Nebulosity in Cygnus

Technical card

Resolution: 3872x2452

Dates:Sept. 10, 2014Sept. 11, 2014Sept. 15, 2014Sept. 16, 2014

Baader Planetarium Ha 35nm: 52x600" ISO200 bin 1x1
IDAS LPS D1: 25x600" ISO200 bin 1x1

Integration: 12.8 hours

Avg. Moon age: 19.51 days

Avg. Moon phase: 72.63% job: 367473

RA center: 305.967 degrees

DEC center: 40.262 degrees

Pixel scale: 1.909 arcsec/pixel

Orientation: -0.466 degrees

Field radius: 1.216 degrees

Locations: Menlo Park, Menlo Park, California, United States


The nebulosity in Cygnus around the bright star Sadr, as seen in the back yard. Combination of Ha data and RGB data from the Pentax K10D camera.

New subexposure duration and ISO setting used with the same Pentax camera. Now using 10 minute subs at 200 ISO. This is to reduce the effect of flexure on the results. Needed to create a new library of calibration files to support this change.

Also, the camera now is cooled with an aggressive stack of Peltier devices which are providing 20C of temperature drop via water cooling.

Ha data gathered from September 10 & 11 with 52 subexposures of 10 minutes at 200 ISO.

RGB data gathered from September 15 & 16 with 25 subexposures of 10 minutes at 200 ISO.

Total integration time was 12 hours and 50 minutes.

Calibrated in Maxim 5.24 with the new library with 36 flats for each filter, 64 bias, and 18-20 darks. Because the Ha filter made getting good flats to be a challenge, Maxim was set to use Median flats vs Bayer Planes.

Each filter group was stacked in DSS then the results were brought into PixInsight for registration to each other and combining via the NBRGB script.



Stephen Migol
License: None (All rights reserved)

Sky plot

Sky plot


Sadr and Nebulosity in Cygnus, 


            Stephen Migol