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FROM THE OBSERVATORY · 18-Apr-2018

Planetary Nebula NGC4361

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Planetary Nebula NGC4361
NGC4361 is a planetary nebula with spiral arms similar to a galaxy. The star at the center of the nebula is shedding its outer layers while contracting to form a white dwarf.
BEHIND THE IMAGE

Notes from the session

Image Integration:
34x 120s Luminance
35x 240s Luminance
36x 240s Red
41x 240s Green
40x 240s Blue



Total exposure 11 hours 56 minutes.

Hardware:

Celestron C11 EdgeHD
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



Location:
Imaged over four nights, high humidity. Orange zone in Brisbane, Australia. (Bortle 7)



Software:
Planning & camera alignment with The SkyX Pro
Captured with AstroArt 6
Guiding with PHD2 + PHD_Dither
CCDInspector: Image analysis & rejection
CCDStack 2+: Calibrate, align, stack.
PixInsight: HDR combination, dynamic background extraction, deconvolution, noise reduction, histogram, curves, color calibration, local histogram equalization.