NGC 6888 The Crescent Nebula
NGC 6888 The Crescent Nebula
The unique Crescent Nebula is about 5000 light-years and contains a Wolf-Rayet star in the core. WR 136 is approximately 4.5 million years old and ending it’s life as it heads toward becoming a supernova. WR 136 became a red supergiant about 120-240,000 years ago and blew a shell of material causing shockwaves and a unique aspect to the Crescent nebula. Another interesting aspect to this is that WR 136 may be a binary partner with a fast orbiting companion star.
Equipment
Telescope: Celestron RASA 11 (620mm focal @ f/2.2)
Filters: Astronomik MaxFR 50x50mm Square SHO & Baader RGB 50x50mm Square
Main Camera: ZWO ASI 6200mm-pro Monochrome
Tilt & BackFocus Adjuster: ASG Photon Cage
Mount: iOptron CEM 120EC
Guide Scope: William Optics 50mm Uniguide
Guide Camera: ZWO ASI 290mm-mini
Location
Location: Pendleton, Oregon
Observatory: NexDome 2.4m Automated
Bortle: 3
Long & Lat: 45.67N, -118.79 W
Shoot Parameters
Date: May 30th, 2023
R: 62 x 30 seconds
G: 57 x 30 seconds
B: 81 x 30 seconds
Ha: 27 x 300 seconds
Oiii: 21x 300 seconds
Total Integration time ~5.6 hrs
Calibration Bias: 20
Calibration Dark: 20
Calibration Flats: 20 for each filter
Gain: 100
Cooling: -10
Processing Software: Stacked in Astro Pixel Processor, captured using NINA, Processed in PixInsight
