Celestial hemisphere:  Northern  ·  Constellation: Monoceros (Mon)  ·  Contains:  NGC 2237  ·  NGC 2238  ·  NGC 2239  ·  NGC 2246  ·  Rosette A  ·  Rosette B  ·  Rosette Nebula  ·  The star 12Mon
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Rosette Nebula NGC 2244 (HSHO), MrCrazyPhysicist
Rosette Nebula NGC 2244 (HSHO)
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Rosette Nebula NGC 2244 (HSHO)

Getting plate-solving status, please wait...
Rosette Nebula NGC 2244 (HSHO), MrCrazyPhysicist
Rosette Nebula NGC 2244 (HSHO)
Powered byPixInsight

Rosette Nebula NGC 2244 (HSHO)

Equipment

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Acquisition details

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Description

Ha: 08.03.2022, 19:17 - 20:38 UT
OIII: 08.03.2022, 20:43 - 22:02 UT
SII: 09.03.2022, 19:05 - 20:26 UT

ZWO ASI 1600 MM Pro @ -20°C (Gain=139, Offset=21)
+ C14 & Starizona Hyperstar @ 675 mm (f/1.9)
+ Baader 2" Ha, OIII, SII filter
on CGE-Pro mount

Cable managment to mitigate diffraction spikes: https://www.flickr.com/gp/daniel_koehn/z61GdH

Autoguiding:
Artesky 70 mm Guidscope (f=400 mm)
ZWO ASI 120 MM mini
PhD2 (Multistarguiding)
Dither

light frames:
25 x 120 s (Ha)
34 x 120 s (OIII)
37 x 120 s (SII)

dark frames:
30 x 120 s per channel

acquired with N.I.N.A.

Post-Processing:

PixInsight

Processing based on the excellent HSHO tutorial https://youtu.be/UzL_UwcqkfI by @cuivlazygeek

Ha, OIII, SII channel:
Image calibration (dark + bias frames only), star alignment, image integration, dynamic crop, dynamic background extraction according to this video https://youtu.be/eB0J4-O5WUQ by @visibledark_astro, Darkarchons EZ Processing Suite: EZ Softstretch

HSHO combination via LRGBCombination with 100% weight on the green channel, remove magenta tints in the color image by image inversion and SCNR, star extraction using Starnet2

Starless HSHO processing:
curves transformation for contrast enhancement, create luminance mask, contrast/color saturation/hue, R, G, B, enhancement of nebula by curves transformations

Sharpening of L:
enhanced luminance sharpening using this video https://youtu.be/uzwVTZUYNZw by @visibledark_astro

Topaz Denoise AI:
Remove noise from starless image:
Low Light Mode On
Sharpen: 0
Remove Noise: 5

Finally, add stars to starless image using Pixelmath, final contrast/color saturation tweaks with curves transformations

Location (Bortle 4): Schwentinental, Germany

Comments

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Rosette Nebula NGC 2244 (HSHO), MrCrazyPhysicist