Hydrogen Alpha version 

HaOIIIRGB version

SHOrgb version

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Catalogue and alternative designations NGC 6188 and NGC 6193 


Type Emission nebula and open cluster 
Position 16 40 05, -48 47
Constellation Ara
Camera and Telescope STXL6303 and 36.8cm RCOS Ritchey Chretien
Focal Ratio F9
Exposure Details Hydrogen Alpha = 300 minutes using 3nm Chroma filter, Oxygen III = 340 minutes (Astrodon series 1 filter), Sulphur II = 340 minutes, Red = Green = Blue = 35 minutes (Astrodon filters). Colour version is HaOIIIOIII layered with RGB. The SHO (Red = Sulphur II, Green = Hydrogen Alpha, Blue = Oxygen III) version is layered with the RGB exposure to produce more natural looking stars.


Description A combination of faint emission nebulosity and a bright but scattered open cluster. The complex is about 4000 light years distant.