The Crescent Nebula ... NGC 6888
July 22, 2020
(Click on Picture for larger view)

The Crescent Nebula ... NGC 6888
This is a 3-hour exposure of the nebula and surrounding area that I took on the night of July 22, 2020. I used the Orion ED80T CF telescope and the Altair Hypercam 294c Pro TEC camera. This is an emission nebula in the constellation Cygnus, about 5,000 light-years away from Earth. It is the result of the collision of shock waves from a star that expanded to a red giant, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures. I might try it again tonight using a UHC filter to bring out more of the emission nebulosity.

This is the case where I was able to have the capture program N.I.N.A. to automatically slew to the object, center it, then record 3 hours of imaging while I was asleep. I am learning more and more about N.I.N.A.

That 'Techy' Stuf

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Telescope: Orion ED80T CF
Mount: Celestron AVX
Mount setting and alignment via Celestron PWI software
Rig to Indoor Computer Connection: USB 2 196 feet Extender via cat 6 cable
Star Alignment: Celestron StarSense
Camera: Altair Hypercam 294c Pro TEC
Sensor Temperature: 0°C (32°F)
Filter: None
Capture software: N.I.N.A. v 1.10
Guiding: PHD2
Binning: 1x1
Post processing in Photoshop CC
Focus Controller: Pegasus Cube
Polar Alignment: QHY Pole Master
Light Frames used: 36 at 300 seconds / Gain: 450
Binning: 1x1
Dark Frames: Nine
Flat Frames: 30
Dark Flat Frames: 20
Stacked in Deep Sky Stacker
Post Processed in PixInsight and Photoshop CC
Seeing Conditions:10 (0-10, where 0 is total cloud cover)
Moon: No Lunar Interference
Bortle Light-Pollution zone: 4.5 (can barely see the Milkyway)
Air Temperature: 83°F
Date: July 22, 2020 Location: My Backyard, Savannah, GA

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