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FROM THE OBSERVATORY · 11-Sep-2017

Messier 75 Globular Cluster

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Messier 75 Globular Cluster
Messier 75 is a dense globular cluster 65000 light years away. This test shot is the first published photo from my new 10" f/4 newtonian telescope, and it's been quite a journey to get a nice field corrected image from it. Now I wait for the new moon and a suitable target.
BEHIND THE IMAGE

Notes from the session

Image:
25x 120s Light pollution filter as luminance bin1x1
12x 120s Red bin1x1
12x 120s Green bin1x1
13x 120s Blue bin1x1


Total exposure 2 hours 4 minutes.

Hardware:
GSO 10" f/4 newtonian
SkyWatcher EQ8 Pro Mount
QSI 683-ws8 Camera @ -15°C
Teleview Paracorr II field flattener
Astronomik Typ2 LP & RGB filters
Starlight Xpress Lodestar X2 Autoguider
Starlight Instruments Focus Boss II



Location:
Orange zone in Brisbane, Australia. (Bortle 7)
Imaged during full moon.



Software:
CCD Autopilot 5
The Sky X Professional Edition
FocusMax V4
CCDInspector: Image analysis & rejection
CCDStack 2+: Calibrate, align, stack, deconvolution, remove gradients, combine RGB.
Photoshop CC: Combine LP+RGB, noise reduction, curves, saturation, crop.