ASTROPIXELSEATONS HILL OBSERVATORY
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FROM THE OBSERVATORY · 08-Nov-2021

Lyon Group of Galaxies 455

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Lyon Group of Galaxies 455
This interacting trio of galaxies is known as the Lyon Group of Galaxies 455, made up of the galaxies NGC 7233 (middle), NGC 7232 (upper), and NGC 7232B (right).
BEHIND THE IMAGE

Notes from the session

The two brightest objects near the center of the image are foreground stars in our own galaxy. Dark lanes of dust can be seen in NGC 7232 and NGC 7233, while NGC 7232B shows bright spots of young, blue stars along its spiral arms.



Image:
132x 300s Luminance (CLS-CCD light pollution filter)
55x 300s Red
54x 300s Green
51x 300s Blue


Total integration 24 hours 20 minutes. Focal length: 2800mm

Hardware:
Celestron 11" EdgeHD
Skywatcher EQ8-Rh Pro mount
QSI 683-ws8 Camera @ -15°C
Astrodon RGB Gen2 E-Series Tru-Balance filters
Astronomik CLS-CCD light pollution filter
Starlight Xpress Lodestar X2 Autoguider
Starlight Xpress Large Format Active Optics
Innovations Foresight ONAG
Starlight Instruments Feather Touch Focuser



Location:
Exposed over 5 nights between 7th August to 7th September 2021
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, HDR multiscale transform, histogram, curves, crop.