Pinwheel Galaxy – M101
Pinwheel Galaxy
This is the pinwheel galaxy which is located near the tail of the Big Dipper (ursa major). The galaxy is hard to capture on a little scope but after 2 hours and 80 sub-exposures of 60 seconds, they were stacked and processed into this. Filters were Luminance, Hydrogen Alpha, Red, Green, Blue and put through a lot of processing to bring it all out from the data.
Equipment
Telescope: Meade 6000 series 70mm Quadruplet @ f/5
Main Camera: ZWO ASI 1600mm-pro Monochrome
Mount: Skywatcher EQ6r-Pro
Guide Scope: William Optics 50mm Uniguide
Guide Camera: ZWO ASI 290mm-mini
Computer: ASIair PRO
Location
Location: Pendleton, Oregon
Bortle: 4
Long & Lat: 45.67N, 118.79 W
Shoot Parameters
Ha Filter: 10×60″
Red Filter: 20×60″
Green Filter: 20×60″
Blue Filter: 20×60″
Light Filter: 10×60″
Calibration Bias: 20
Calibration Dark: 20
Calibration Flat: 20
Bad Pixel Map from APP
Integration Time: ~80 minutes total
Gain: 139 (unity)
Cooling: -20
Processing Software: Photoshop CC, Astro Pixel Processor, Starnet, ASIair PRO
