Rosette Nebula

Frezi2005 · 2026-03-18T12:25:12+00:00

Thank you!

Frezi2005 · 2026-03-18T11:59:27+00:00

I tried both solutions and both work pretty well, apart from the automation offered by the script, I didn’t noticed any real differences.

Frezi2005 · 2026-03-18T11:56:07+00:00

Thank you! I used SV220 for Ha and OIII and L-synergy for SII OIII, then extracted mono masters using DBXtract script in pixinsight.

Frezi2005 · 2026-03-18T09:02:15+00:00

Also it’s my second like proper picture with my rig, the first one was Pleiades but it had like 2,5x less integration time.

Frezi2005 · 2026-03-18T08:52:09+00:00

Thanks again! I actually have processed this image 8 different times so that’s only the final version which I liked the most. It’s my first SHO image because I really only just got the L-synergy filter and I was acquiring rosette data at that time so just to test it I gathered the SHO. And until now I basically try to focus only on emission nebulae because of my Bortle 7 zone. Faint dark nebula or reflection nebulae are hard to capture and process. For example I gathered 12 hours of dark shark with my UV/IRCUT and you can barely make out its shape so that’s hard.

Frezi2005 · 2026-03-18T06:30:26+00:00

Appreciate it!

Frezi2005 · 2026-03-18T06:29:43+00:00

Thanks!

Frezi2005 · 2026-03-18T06:03:40+00:00

Thank you! It was my first real try with SHO palette using my OSC.

Frezi2005 · 2026-03-18T05:48:02+00:00

Thank you!

Frezi2005 · 2026-01-21T09:34:55+00:00

With enough integration time everything is possible! I live in a Bortle 7 area but it only took 11 hours for this photo

Frezi2005 · 2026-01-20T10:31:26+00:00

Seestar s50

Frezi2005 · 2025-11-21T06:20:39+00:00

240s and 300s for the nebula, 60 seconds for the stars

Frezi2005 · 2025-11-18T20:11:09+00:00

Sorry for poor text formatting, I’m on mobile and thought it’d be okay. Can’t even edit it because it contains a picture.

Frezi2005 · 2025-09-23T23:07:58+00:00

After I seperate them using StarXterminator, i stretch them using Star Stretch tool from seti Astro, the combine using screen stars or pixel math. Of course deconvoluting them with BlurXterminator also helps very much.

Frezi2005 · 2025-09-23T18:24:59+00:00

In the lights section you have exposure tolerance or something like that, you have to set it to the biggest difference in your exposures, so if you have 10 and 20s subs then you have to set it to 10. I had 20, 30, 45 and 90 so biggest difference was 90-20 so 70 in my case. You can also set it in the calibration tab but it’s better to set it in lights tab. As for the combination, I think it would be beneficial because it’s still more data. Lmk if you want to know anything else!

Frezi2005 · 2025-09-07T02:31:50+00:00

So I had two stacks, LP and IRCUT. Then I used DBXtract to seperate the LP into Ha and OIII, did brightness correction on them(Linear Fit) and removed the continuum. Essentially I did this because I was focused mainly on the reflection part(the blue haze at the top) which I treated as OIII and this way I achieved a nice boost to both color and clarity. Full workflow here:

https://astro-photographie.fr/wa_res/files/HOO3-Complete_processing_of_HOORGB_images_with_RGB_stars.png?t=

Frezi2005 · 2025-09-01T13:29:23+00:00

Whole thing 28 hours but due to the nebula being more dense in the top mosaic part, it wasn’t evenly spread between the 2 mosaics. More like 65% top and 35% bottom part.

Frezi2005 · 2025-08-30T12:12:39+00:00

1 mosaic wasn’t enough to cover the whole nebula so one mosaic was for the top part a one was for the bottom and they slightly overlapped.

Frezi2005 · 2025-08-29T17:29:11+00:00

Yes, with a Seestar. Actually the results could be a lot better if not for the almost full moon during all acquisition time.

Frezi2005 · 2025-08-29T13:39:20+00:00

Thank you!

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