alan4908 Posted September 18, 2019 Share Posted September 18, 2019 SH2-201 is a small emission nebula located in Cassiopeia. It is often captured as a by product of the commonly imaged Soul Nebula (SH2-199), which is partially shown here to left of the SH2-201. On the annotated image below, I've also marked the location of a Herbig-Haro object (HH-163). These transient objects are formed when high speed narrow jets of partially ionized gas from new born stars collide with nearby clouds of gas and dust. Typically, they only last a few tens of thousand of years. On the processing front, I decided to process the nebula separately from the starfield by firstly removing the stars and then adding them back, which seemed to help in getting better definition of the blue stars within the nebula. This LRGB image has a Ha blend into the Lum and Red channels and represents about 31 hours integration time. It was taken with my Esprit 150. Alan LIGHTS: L:40, R:19,G:22, B:17 x 600s. H: 30 x 1800s. DARKS: 30, BIAS:100, FLATS:40 all at -20C Link to comment Share on other sites More sharing options...
Petergoodhew Posted September 18, 2019 Share Posted September 18, 2019 An excellent image of a target so often overshadowed by its big neighbour. Well done. That long integration has really paid off. Link to comment Share on other sites More sharing options...
Rodd Posted September 18, 2019 Share Posted September 18, 2019 Lovely....makes me pine for LRGB, which I find difficult. I really like the naturalness of the image...and the scale! You really "got right in there". Is this a crop? Sh2-201 is quite a little gem. Rodd Link to comment Share on other sites More sharing options...
alan4908 Posted September 19, 2019 Author Share Posted September 19, 2019 17 hours ago, Petergoodhew said: n excellent image of a target so often overshadowed by its big neighbour. Well done. That long integration has really paid off. Thanks Peter. 17 hours ago, Rodd said: Lovely....makes me pine for LRGB, which I find difficult. I really like the naturalness of the image...and the scale! You really "got right in there". Is this a crop? Sh2-201 is quite a little gem. Rodd Hi Rodd Yes, Narrow Band imaging is great for revealing detail but in my opinion you cannot beat LRGB from naturalness. I do agree it is difficult, particularly when you have nebulosity around. Yes, it is a crop, although not very much has been chopped ! Alan Link to comment Share on other sites More sharing options...
knobby Posted September 19, 2019 Share Posted September 19, 2019 Really beautiful ! Link to comment Share on other sites More sharing options...
alan potts Posted September 19, 2019 Share Posted September 19, 2019 Beautiful image, never seen it so good as this. Alan Link to comment Share on other sites More sharing options...
alan4908 Posted September 20, 2019 Author Share Posted September 20, 2019 23 hours ago, knobby said: Really beautiful ! Thanks Knobby 21 hours ago, alan potts said: Beautiful image, never seen it so good as this. Alan Thank you Alan. Link to comment Share on other sites More sharing options...
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