IMAGE DETAILS:

This large area of emission nebulosity surrounds Sadr (Gamma Cygni) the brightest star in this photo and the heart of the constellation of Cygnus, the Swan (aka the Northern Cross).  Numerous star clusters and dark Bok globules can also be found embedded in the nebulosity.  Sadr is located 1800 light years from the Sun and has a visual magnitude of 2.2.  Sadr can be found directly overhead during October evenings. 

The two sections of nebulosity below Sadr are called the Butterfly Nebula, and have the catalog designation of IC 1318. The large area of dark nebulosity that separates the two halves of the Butterfly is LDN 889. 

A small bluish open star cluster (NGC 6910) is just to the lower left of Sadr.  The entire area is also referred to as the Gamma Cygni Nebula. 

• Date & Location:  Oct 18, 19, 20 - 2020 - StarEffects Observatory, Bernville, PA

• Weather:  Breezy on first night, calm thereafter. Average Temp mid-40's. 

• Sky Conditions:  Clear with above average transparency all 3 nights.

• SQM-L:  20:17 to 20:26 start of each night > 20:40 at end of each night.

• Optics:  TeleVue NP101is - 4" Refractor w/field flattener = 540mm @ f5.4

• Filter:  LPS-IDAS 48mm located in image train (Light Pollution Suppression)

• Mount:  AP900GTO

• Guiding:  Orion SSAG @ 5-6 second exposures w/TeleVue TV60is - Excellent Graph PHD2.

• Camera:  Canon 6D Hutech Ha Modified

• Exposure:  6 hours 40 min = 66 x 5 minute subs @ ISO 800 RAW using Custom White Balance

• Calibration Frames:  10 Darks, 10 Bias, 10 Field Flats w/Alnitak Flat Man (flats were corrupted, not used) - All Custom White Balance

• Processing:  Images Plus 5.75a, PS CS6, NIK filters, RC-astro, Carboni Actions Tools.

• Comments:  The Sadr Nebula region is a rather bright area of emission nebula, and one that I had never photographed before.  Some care had to be taken since it lies almost directly overhead so that the scope would not hit the pier.