Here we have used 1500s sub exposures with a total integration time of about 5 hours. As you can see the rest of the frame is completely devoid of anything Ha emission, suggesting a lot of dust in this region.
Right above the nebula is supposed to be the open cluster NGC 1624, but nothing like a cluster shows in this filtered image. I am assuming the map is wrong and these are one and the same object
Distance to Sh-212 is estimated to be around 6000pc, so it would be pretty impressive if we got closer!
This object is part of the Sharpless Catalogue of HII regions
This image was autoguided using my homemade off axis guider with Lodestar.
Exposure Details :
Astrodon 3nm Ha Coma Corrector 12x1500s on 200 @ F5 f.l. 1000 with Atik 450 camera
Curdridge Observatory, Southampton,UK