Sh2-170, the Little Rosette nebula.
This little gem is a H2 region in Cassiopeia. It's surrounding starfield is absolutely gorgeous. There's a super bright star at the core of the nebula providing the illumination and as can be seen in the image, it has almost blown a hole through the core.
The nebula is 7,500 light-years away in the perseus arm of our Milky Way. It's fairly small at only 2/3 the diameter of the moon. Being dim, small, and far away means it's not imaged very often.
I shot the images for this photo during December 2022. 300s subs, for 19 hours of integrated exposure.
Imaged with an ASI2600MC camera using a radian ultra quad-band narrow-band filter, and a Skywatcher 120ED telescope at 840mm FL, riding a SkyWatcher EQ6r pro mount.
Image capture using APT and PHD2 with EQMOD. Image processed manually in PixInsight. The workflow I used in this image was: Image Calibration, Cosmetic Correction, Debayer, Subframe Selection, Star Alignment, Local Normalization, Image Integration, Crp, DBE (division), Denoise, Decon, Image Solver, SPCC, GHS , starless, hstrtch, crv, HOO, Rcrv, Bcrv, Ccrv, Ycrv, crv, lhe, dse, star blend, Tiff, jpg
Cheers!
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