SH2-261 Lower's Nebula - a photo on Flickriver

SH2-261 Lower's Nebula

            After many months of clouds, wind and/or extreme temperatures, we finally completed this winter target.  Imaged from late February to late March as conditions allowed.  
The HII region, Sh 2-261, is often called Lower's nebula because it appears on a photographic plate taken by the father-and-son team of Harold and Charles Lower in 1939.
Image captured over 5 nights; 2022-02-25, 2022-03-06, 21, 24 & 29
15 hours 40 minutes total integration
Ha subs  23 * 1,200 sec = 7 hours 40 min
OIII subs 9 * 1,200 sec = 3 hours 
SII subs  15 * 1,200 sec = 5 hours 
Imaging Equipment:
SharpStar 140PH Triplet 910mm focal length
Mesu 200 MKII mount,
ZWOASI2600MM Pro camera
SHO 3.0nm filters
   

Taken on: April 19, 2022

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