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FROM THE OBSERVATORY · 28-Nov-2017

Robins Egg Nebula

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Robins Egg Nebula
NGC 1360 is known as the Robin's Egg Nebula, primarily due to its blue hue from strong oxygen-III emissions. It is a diffuse planetary nebula 1794 light years away. Presented is a narrowband image with H-alpha emissions mapped to red, and OIII emissions mapped to both green and blue (HOO palette).
BEHIND THE IMAGE

Notes from the session

Image:
47x 600s Ha bin2x2
50x 600s OIII bin2x2
22x 60s Red bin1x1
32x 60s Green bin1x1
20x 60s Blue bin1x1


Total exposure 17 hours 24 minutes.

Hardware:
Celestron 11" Edge HD
Celestrong 0.7x EdgeHD focal reducer
Skywatcher EQ8 Pro mount
QSI 683-ws8 Camera @ -15°C
Astronomik 6nm Ha, 6nm OII, Deep Sky RGB filters
Starlight Xpress Active Optics
Starlight Xpress Lodestar X2 Autoguider
Innovations Foresight On Axis Guider
Starlight Instruments Focus Boss II



Location:
Orange zone in Brisbane, Australia. (Bortle 7)
Imaged over 10 nights, 0% to 50% moon.



Software:
Planning & camera alignment with Aladin 9
Captured with AstroArt 6
Guiding with PHD2 + PHD_Dither
FocusLock live focusing
CCDInspector: Image analysis & rejection
CCDStack 2+: Calibrate, align, stack, combine RGB.
Photoshop CC: Shadows/highlights, combine Ha+OII+RGB, noise reduction, curves, adjust colour balance, saturation, crop.