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FROM THE OBSERVATORY · 16-Nov-2018

Spiral Galaxy NGC289

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Spiral Galaxy NGC289
Seen face-on, this large spiral galaxy is 70 million light years away, with a bright core and very faint blue arms. A companion elliptical galaxy seems to be interacting with a spiral arm.
BEHIND THE IMAGE

Notes from the session

Image:
28x 900s luminance
28x 450s red
22x 450s green
25x 450s blue


Total integration 16 hours 23 minutes.

Hardware:
Celestron 11" EdgeHD
Celestron EdgeHD 0.7x focal reducer
Skywatcher EQ8 Pro mount
QSI 683-ws8 Camera @ -15°C
Astronomik UHC, deep sky RGB filters
Starlight Xpress Lodestar X2 Autoguider
Starlight Xpress Active Optics
Innovations Foresight On Axis Guider
Starlight Instruments Focus Boss II



Location:
Imaged on 6 nights between October 9 and November 11, 2018.
Orange zone in Brisbane, Australia. (Bortle 7)



Software:
Planning & camera alignment with Aladin 10
Captured with TheSkyX Professional
Guiding with PHD2
FocusLock live focusing
PixInsight: Calibrate, evaluate sub-frames, align, stack, crop, dynamic background extraction, deconvolution, color calibration, reduce noise, LRGB combination, histogram stretch, HDR multiscale transform, curves.