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FROM THE OBSERVATORY · 21-Nov-2020

Spiral Galaxy NGC 6744

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Spiral Galaxy NGC 6744
NGC 6744 (Caldwell 101) is a spiral galaxy about 31 million light-years away, tilted towards our line of sight. It is thought to be one of the most Milky Way-like spiral galaxies in our immediate vicinity. It also has at least one distorted companion galaxy similar to the Magellanic Clouds.
BEHIND THE IMAGE

Notes from the session

Image:
108x 300s Luminance
53x 300s Red
46x 300s Green
112x 300s Blue


Total integration 26 hours, 35 minutes. Focal length: 1960mm

Hardware:
Celestron 11" EdgeHD
Celestron 0.7x EdgeHD focal reducer
Skywatcher EQ8 Pro mount
QSI 683-ws8 Camera @ -15°C
Astrodon LRGB Gen2 E-Series Tru-Balance filters
Starlight Xpress Lodestar X2 Autoguider
Innovations Foresight ONAG
Starlight Instruments Feather Touch Focuser



Location:
Exposed over 6 nights between 19th to 27th April 2020
Orange zone in Brisbane, Australia. (Bortle 7)



Software:
Planning & camera alignment with Aladin 10
Captured with TheSkyX Professional
Guiding with PHD2
PixInsight: Calibrate, align, integrate, dynamic background extraction, LRGB combination, noise reduction, photometric color calibration, histogram, HDR multiscale transform, curves, crop.