December 2017: Sharpless 2-240

This is a HUGE object. So it doesn’t fit into my FOV and would need a mosaic. Maybe I’ll try the mosaic, but I’ll need a moonless night to avoid gradients (which easily spoil the mosaic work).

For this image, I used H-alpha to overcome the moonlight, As it is also a weak object, I exposed 1,000-second subs. Then I took some RBG subs just to color the final image. I processed using the synthetic-R method.

Sharpless 240 signedGo to this object description and this image technical detail.