SH2-249 Nebula in Narrowband
Copyright © 2012
SH2-249 emission nebula in the constellation Gemini
The narrowband palette used was the CFHT Palette with Ha in red, OIII in green, & SII in blue.
Camera: SBIG ST-10XME
Telescope: Astrophysics Starfire 140 EDT F7.5
Mount: Astro-Physics Mach1 GTO with Advanced Telescope Systems portable pier
Images: 78 subexposures of 15 minutes each with 25 of Ha in red, 28 of OIII in green, and 25 of SII in blue for a total of 19 hours & 30 minutes.
Date: January 2012
Software: Camera, mount, and guider control - CCD Commander & MaximDL; calibration, stacking, & RGB creation in CCDStack, and further processing in Photoshop CS5.