Image of the day

Captured by
Douglas Rollain

M20 Trifid Nebula in LRGBHa

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Sh2-245 image

Sh2-245


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

The rarely imaged, huge arc (Sharpless 2-245) to the West of Barnards Loop. Mosaic with Nikon 180mm, STL11K camera (@-30C, with water cooling and nitrogen purge), Barr Associates 4nm H-a filter, 14 hours total (1 hour subframes). Field of view about 11x14 degrees. Orientation is with North to the right. Processing in Maxim, with gamma stretch.