Thank you for sharing your photos - this is exactly what this project is all about! :-)
NGC 7023 Iris Nebula
Distance from Earth: about 1300 light years.
Nebula discovered on 10/18/1794
Diameter: approximately 6 light years.
Color: blue dominates, which occurs due to the reflection of light from nearby stars by dust.
Structure: the nebula consists of dusty material surrounding a massive, hot, young star in the formation stage.
Features: the shape of the nebula resembles a flower, and the star cluster above the center looks like a "cylinder".
33 frames of 180 seconds each
Calibration:
20 flats, 10 darks, 20 biases
Equipment:
SW 150/750 tube
Heq 5pro mount
Canon 6d mark II camera
Datyson T7C guide camera
05/23/2025 Merzhanovo
Bortle 4
Stacking in Siril
Background GraXpert
Edited in Pixinsight
Final touches in Photoshop
In reality, this is the maximum I could squeeze out of my current skill level. I tried processing without star separation, with photometry and playing with curves, but the dust barely showed up.
The second option I tried with star separation and masks... in my opinion the second one is more interesting, I will collect more signal....
Good work. For dust, you need more integration time and ideally a darker sky. Also, the bright stars have diffraction spikes; put a mask on the corrector plate to cover the edge. It will be noticeably better.
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