NGC 2237 Rosette Nebula
NGC 2237 Rosette Nebula
This is the first light for my RASA 11, so decided to try out the big bright Rosette in RGB and SHO in one clear cold evening with fairly good seeing. It’s a giant molecular cloud just east of Orion’s belt that has tons of good signal in hydrogen, sulfur, and oxygen. The little cluster inside is NGC 2244. This nebula sits about 5200 light years away from us and it’s big, about 130 light years across.
Equipment
Telescope: Celestron RASA 11 (620mm focal @ f/2.2)
Filters: Baader Ultra-Highspeed F/2 3.5nm & 4nm Filters.
Main Camera: ZWO ASI 1600mm-pro Monochrome
Mount: Skywatcher EQ6r-Pro
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: January 21, 2022
Hydrogen Alpha: 99 x 60 seconds
Oxygen-III: 97 x 60 seconds
Sulfur-II: 96 x 60 seconds
Red: 44 x 10 seconds
Green: 45 x 10 seconds
Blue: 50 x 10 seconds
Calibration Bias: 20
Calibration Dark: 20
Calibration Flats: 30
Integration Time: ~5.25 hours total
Gain: 139 (unity)
Cooling: -20
Processing Software: Astro Pixel Processor, StarXTerminator, NINA
