ASTROPIXELSEATONS HILL OBSERVATORY
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FROM THE OBSERVATORY · 21-Apr-2017

NGC 2835 Spiral Galaxy

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NGC 2835 Spiral Galaxy
NGC2835 is a small, faint spiral galaxy in the Hydra constellation. It was probably too small and faint to attempt from the suburbs of Brisbane, but I persisted through the very few clear nights I could get over the last 6 weeks.
BEHIND THE IMAGE

Notes from the session

Image:

49x 600s Lum bin1x1 + 20 flat + 50x dark + 120x bias
9x 600s Red bin1x1 + 20 flat + 50x dark + 120x bias
9x 600s Green bin1x1 + 20 flat + 50x dark + 120x bias
9x 600s Blue bin1x1 + 20 flat + 50x dark + 120x bias


Total exposure 12 hours 40 minutes.

Hardware:

Celestron EdgeHD 1100
Celestron EdgeHD 0.7x focal reducer
SkyWatcher EQ8 Pro Mount
QSI 683-ws Camera @ -15°C
Astronomik typ 2c RGB filters
Starlight Xpress Lodestar X2 Autoguider
Innovations Foresight On Axis Guider
Starlight Instruments Focus Boss II
Starlight Xpress Adaptive Optics



Location:

Orange zone in Brisbane, Australia. (Bortle 7)
Imaged 8 nights over 6 weeks due to long periods of heavy cloud cover



Software:

Planning & camera alignment with Aladin 9
Captured with AstroArt 6
Guiding with PHD2 + PHD_Dither
Live focusing with FocusLock
CCDInspector: Image analysis & rejection
CCDStack 2+: Calibrate, align, stack, gradient removal, deconvolution, combine RGB.
Photoshop CC: Reduce noise, curves, high pass filter, combine L+RGB, color balance, saturation.