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Sharpless 261

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#1 Dan Crowson

Dan Crowson

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Posted 25 January 2020 - 06:09 PM

Sh2-261 (LBN 863, Simeis 34, Lower’s Nebula and others) is an emission nebula located approximately 6,164 (http://simbad.u-stra...AJ....150..147F) light-years away in Orion.

Ha – 24x1800s – 720 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2

840 minutes total exposure – 14 hours

Imaged from Dardenne Prairie, Missouri (a red zone) on November 18th and 23rd and December 3rd and 6th, 2019 with a SBIG ST-8300M on an Astro-Tech AT90DT at f/6.7 603mm.

HaRGB - https://www.flickr.c...691283/sizes/l/

I also captured luminance but it was very faint:

Luminance – 12x600s – 120 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2

240 minutes total exposure – 4 hours

LRGB - https://www.flickr.c...702458/sizes/l/

 

See the links above because the attached image has been down-sampled.

 

Sh2-261%20-%20CN%20-%20HaRGB.jpg

 

Dan


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