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Catalogue and alternative designations Trifid Nebula, M20, NGC 6514


Type Combined emission and reflection nebula 
Position  18 02 23, -23 01 48
Constellation Sagittarius
Camera and Telescope STXL16200 and 36.8 cm Ritchey Chretien 
Focal Ratio F9
Exposure Details This is a LHaRGB image (normal colour augmented by hydrogen alpha to bring out the emission nebulosity). Luminance was 70 minutes (unbinned), Red = Green = Blue = 50 minutes, Hydrogen Alpha = 90 minutes (all binned 2x2)
Description The Trifid nebula needs no introduction as it is one of the most popular deep sky objects. It is a near neighbor in the sky to the Lagoon Nebula (M8). The Trifid structure is visible in small telescopes. The distance is about 4100 light years and the nebula is about 28 arcmins across.