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FROM THE OBSERVATORY · 13-Jun-2018

Barred Spiral Galaxy NGC5921

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Barred Spiral Galaxy NGC5921
The barred grand spiral galaxy NGC 5921 lies 65 million light years away. It was discovered by William Herschel on 1 May 1786. There are several background galaxies present in the image.
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Notes from the session

Image:
63x 450s Red
16x 450s Red
16x 450s Green
18x 450s Blue


Total integration 14 hours 8 minutes.

Hardware:
Celestron 11" Edge HD
Skywatcher EQ8 Pro mount
QSI 683-ws8 Camera @ -15°C
Astronomik Typ2c Luminance, Deep Sky RGB filters
Starlight Xpress Active Optics
Starlight Xpress Lodestar X2 Autoguider
Innovations Foresight On Axis Guider
Starlight Instruments Focus Boss II



Location:
Orange zone in Brisbane, Australia. (Bortle 7)
Imaged over 6 nights, new moon.



Software:
Planning & camera alignment with Aladin 9
Captured with AstroArt 6
Guiding with PHD2 + PHD_Dither
FocusLock live focusing
CCDInspector: Image analysis & rejection
CCDStack 2+: Calibrate, align, stack.
PixInsight: Dynamic background extraction, noise reduction, deconvolution, combine LRGB, color calibration, background neutralization, HDR multiscale transform, curves, local historgram equalization, non-linear stretch