Image of the day

Captured by
Douglas Rollain

M20 Trifid Nebula in LRGBHa

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Sadr region image

Sadr region


Acquisition Details
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Description

The great region of nebulosity centered on Sadr in Cygnus. Deneb is in the bottom left corner. Taken with a Nikon 180mm, STL11K camera, Barr Associates 4nm Ha filter. The field of view is about 8x12 degrees, and contains the bright nebula IC1311, IC1318, NGC6888 (the Crescent Nebula), several star clusters and planetary nebula, and the interesting S shaped nebula Simeis 57 (upper left quadrant, just above center). 10 hours total integration, 30 minute subframes. Processing and Log stretch in Maxim.