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FROM THE OBSERVATORY · 26-Sep-2018

Messier 2 Globula Cluster

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Messier 2 Globula Cluster
55,000 light years away, Messier 2 (M2) is one of the largest known globular clusters.
BEHIND THE IMAGE

Notes from the session

Image:
15x 25s red
19x 300s red
12x 45s green
17x 300s green
12x 45s blue
17x 300s blue


Total integration 4 hours 25 minutes.

Hardware:
Celestron 11" EdgeHD
Celestron EdgeHD 0.7x focal reducer
Skywatcher EQ8 Pro mount
QSI 683-ws8 Camera @ -15°C
Astronomik luminance, 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 a single night, full moon, 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, align, stack, crop, HDR combination, dynamic background extraction, color calibration, reduce noise, RGB combination, background neutralization, histogram stretch, HDM multiscale transform, curves.