NGC 6888 (Crescent Nebula) in Red
Posted: Mon Jun 18, 2018 3:42 pm
NGC 6888 (Crescent Nebula) - An Emission Nebula in Cygnus
This is the first of four components of an LRGB composite image.
Red filter
Total Integration Time: 91 minutes
Some star elongation which can be reduced with choice of a higher rejection ratio in DSS.
Used 50 dark frames instead of 30. This makes a significant difference in SNR in my opinion.
I'll give much more details when the final LRGB image is completed.
Brian
This is the first of four components of an LRGB composite image.
Red filter
Total Integration Time: 91 minutes
Some star elongation which can be reduced with choice of a higher rejection ratio in DSS.
Used 50 dark frames instead of 30. This makes a significant difference in SNR in my opinion.
I'll give much more details when the final LRGB image is completed.
Brian