By Soumya Seal | 2025-09-07
NGC 7822 and Sharpless 171
On 09/05/2025 02:00 am by Kartik Kota | Website | Wales, United Kingdom
This image shows the nebula NGC 7822 and the emission region (Sharpless 171).
This nebula is a vast cosmic cloud, and a star-forming region in Cepheus, about 3,000 light-years away where massive stars carve intricate shapes into the surrounding gas and dust. In my image, I tried to bring out both the fine filamentary detail of the ionised gases and the deep contrast between the dark nebula and the bright emission regions.
Redcat 51 WIFD with L-Ultimate 2” filter
ZWO ASI 533MC pro
AM3 Mount
Autoguiding with ASIAIR Plus, ASI 120mm guide camera and 30mm guidescope
Lights: 53x300s
Flats: 25 frames
Bias: 20 frames
Processed in Pixinsight: WBPP, DBE, RGB extraction, Stars Extraction, Curves Transformation and Narrowband normalisation, Stars addition, Noise Reduction and Blur Correction