12/14/2015 NGC7635 The Bubble Nebula

14 December 2015

After taking almost a year off from astrophotography I decided to revisit some of the image data I collected in 2014 but never processed.  The image presented here is NGC 7635 otherwise known as the Bubble Nebula (for obvious reasons).  You can read more about the Bubble Nebula in the wikipedia article.

NGC 7635 is presented here in Hubble palette (Red = S II, Green = HA, Blue = O III)

NGC7635 – The Bubble Nebula
Capture date: July 9, 2014 – August 5, 2014
LRGB image using Ha for Luminance, SII for Red, OIII for Blue and Ha for Green
Astrodon filters: 5nm HA, 5nm SII and 3nm OIII
22 exposures of OIII, with 20 minute subs each
23 exposures of SII, with 20 minute subs each
60 exposures of HA, with 20 minute subs each
Imaging scope: Astro-Tech AT10RC Ritchey Chrétien at f/6.7 (native f/8)
Focal reducer: Astro Physics CCDT67 focal reducer
Imaging camera: QSI 583wsg monochrome
Guide camera: Starlight Xpress Lodestar
Mount: Celestron CGE hypertuned by Deep Space Products
Capture and stacking in Maxim DL
All other processing in Photoshop

Over 35 hours of starlight exposures went into this project.