ASTROPIXELSEATONS HILL OBSERVATORY
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FROM THE OBSERVATORY · 29-Mar-2016

Jewel Box Open Cluster NGC4755

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Jewel Box Open Cluster NGC4755
The Jewel Box, Kappa Crucis Cluster, NGC 4755, is an open cluster in the constellation Crux. This cluster is one of the youngest known, with an estimated age of 14 million years. It is located 6,440 light years from Earth, and contains around 100 stars.
BEHIND THE IMAGE

Notes from the session

Image:

98x 45s Red bin2x2 + 25 flat + 50x dark + 120x bias
114x 45s Green bin2x2 + 25 flat + 50x dark + 120x bias
68x 45s Blue bin2x2 + 25 flat + 50x dark + 120x bias


Total integration 3 hours 30 minutes.

Hardware:

Celestron EdgeHD 1100
SkyWatcher EQ8 Pro Mount
QSI 683-wsg Camera @ -15°C
Astronomik Typ 2c RGB filters
Orion StarShoot Autoguider
Foresight Innovations On Axis Guider
Starlight Xpress Adaptive Optics



Location:

Orange zone in Brisbane, Australia. (Bortle 7)
Average seeing + waning gibbous moon phase.



Software:

Planning & camera alignment with Aladin 9
Captured with AstroArt 6
Guiding with PHD2 + PHD_Dither
CCDInspector: Image analysis & rejection
CCDStack 2+: Calibrate, align, stack, combine RGB.
Astra Image 4.0: Deconvolution
Photoshop CC: Noise reduction, minimum filter, curves, saturation.