NGC281 - Pacman Nebula - SHO false color  
Cassiopeia

HII region in Hubble palete (SHO)		  
 
NGC 281 - sometimes referred to casually as the Pacman Nebula is an H II region in the constellation of Cassiopeia and part of the Perseus Spiral Arm. It includes or is near the open cluster IC 1590, the double star HD 5005, and several Bok globules. It is visible in amateur telescopes from dark sky locations.  
 
Technical details:  
Location:  
 Valdemorillo - Spain
Date:  
 12/09/2020 (dd/mm/yyyy)
Conditions:  
 Bad
Temperature:  
 30ººC
Humidity:  
 
Telescope:  
 GSO Reflector 200mm f/4
Reducer/corrector:  
 Baader MPCC
Filter:  
 Baader OIII 8nm, SII 8nm, Ha 7nm combination
Mount:  
 Orion Atlas EQG
Camera:  
 Atik 314L+
Exposure:  
 10x300s Ha + 10x300s O3 + 5x300s S2
Guiding tube:  
 50/350mm guider
Guiding camera:  
 Meade DSI Pro
Guiding software:  
 PHD2 Guiding
 
Procesing:  
 No dark. Calibrated, registered and integrated with DeepSkyStacker.
Processed with PixInsight.
PixelMath to create Hubble Pallete with Ha, OIII and SII.
LRGB combination using Ha as luminance.		  
Notes:  
 R=0.5*S2 + 0.5*Ha
G=0.15*Ha + 0.85*O3
B=O3
LRGB=1L (Ha as lumance), 0.5 Lightness, 0.3 saturation. Chroma NR.		  
     

 
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