Image of the day

Captured by
Douglas Rollain

M20 Trifid Nebula in LRGBHa

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Much of Cygnus image

Much of Cygnus


Acquisition Details
  • Number of frames:
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  • CMI/CMII/CMIII:
Description

A very widefield in H alpha of much of the Cygnus constellation. Eight panel mosaic with a Nikon 180mm lens, STL11K camera, Barr Associates 4nm Ha filter, ten hours of exposure per panel. Total field of view about 20x20 degrees. Processing in Maxim, with DDP stretch and unsharp mask, concentrating on the weak nebulosity that fills this region.