NGC 7635 - The Bubble Nebula

NGC 7635, also known as The Bubble Nebula which is located in the constellation of Cassiopeia, is a region of ionized Hydrogen gas and dust in our galaxy, giving rise to intense new star formation.
The largest stars contained within the center of the nebula are burning so bright and furiously hot, that they have blown much of the Hydrogen gas away from themselves toward Earth to create the bubble appearance.
The Bubble Nebula lies at a distance of about 7,100 light-years from Earth and the diameter of bubble itself spans about seven light-years across.

Image acquisition and processing information:

First Image:
Date: November 13th, 2023
Telescope: Celestron Edge HD 14" telescope at F11
Mount: Astro-Physics AP-1200 GTO CP3
Camera: ZWO ASI-2400 MC Pro one-shot-color camera
Guiding: Telescope: AstroTech AT72ED, Camera: ASI-294MC Pro
Exposures: 46 three-minute exposures using a IR/UV cut filter (158 gain)
Image acquisition and guiding: ASIAIR Plus
Image processing Software: PixInsight v. 1.8.9.1

Second and third Images:
Date: September 28th, 2022
Telescope: Celestron Edge HD 14" telescope using a Hyperstar v4 lens
Mount: Astro-Physics AP-1200 GTO CP3
Camera: ZWO ASI-2400 MC Pro one-shot-color camera
Image acquisition software: Sequence Generator Pro v. 3.0.3.169
Exposures: 200 3o-second exposures using a IR/UV cut filter
Guiding: Telescope: AstroTech AT72ED, Camera: Starlight Xpress Trius Pro 814 CCD, Software: PhD2
Image processing Software: PixInsight v. 1.8.9.1


Fourth Image:
Date: September 12th, 2015
Telescope: Celestron Edge HD 14" telescope using a Hyperstar v3 lens
Mount: Celestron CGE Pro
Camera: QHY 9 M Mono CCD camera equipped with a 2" five position filter wheel
Image acquisition software: Maxim DL
Exposures in HaLRGB Photo: 15 two-minute exposures unbinned luminance, 15 one-minute exposures each binned 2x2 using red, green and blue filters and 15 three-minute exposrues binned 2x2 using a Baader high speed narrow-band Ha filter
(Note: I clearly forgot to install a IR/UV cut filter into the filter wheel for the luminance subframes, which unfortunately resulted in the very bloated and off-color stars. I look forward to recapturing this image in the future!)
The second photo was processed from the 15 3-minute 2x2 Ha subframes only.
Guiding: Telescope: AstroTech AT72ED, Camera: Starlight Xpress Trius Pro 814 CCD, Software: Maxim DL
Image processing Software: PixInsight v. 1.8.4