DeepSkyHosting
Sign inRegister

Triangulum Galaxy M33

CatS
14481
Category:Deep Sky
Published:
749
Triangulum Galaxy M33NGC 592IC 134IC 136IC 137IC 139IC 140NGC 588NGC 595NGC 598NGC 604IC 131IC 132IC 133IC 135IC 142IC 143
Resolution:
4097x4140 px
File size:
26683 KB

Photo description / processing

Joint imaging together with https://deepskyhosting.com/id1138 Collected almost 33 hours total, my processing Main focus was on narrowband, many interesting nebulae emerged LRGB shot in bortle2, narrowband in bortle9 Processing: pixinsight1.8, fitstacker, graXpert Equipment, parameters: Quattro150p+zwo asi2600mm pro, optolong Olll 3nm, laida Ha 5nm Ha: 120×300" Olll: 240×300" Equipment, parameters https://deepskyhosting.com/id1138 Quattro300p+zwo asi2600MM pro, optolong LRGB L: 15*60" B: 20*60" G: 20*60" R: 20*60" Rasa11"+zwo asi2600mc pro 61*90"

Technical information

Location
Ростов-на-Дону, Россия

Light pollution

Yellow, Bortle 5 zone

Date taken

Exposure

  • 120 × 300″ · ISO/Gain: 100 · Laida Ha 5nm ·
  • 240 × 300″ · ISO/Gain: 100 · Optolong Olll 3nm ·
  • 15 × 60″ · ISO/Gain: 100 · Optolong L ·
  • 20 × 60″ · ISO/Gain: 100 · Optolong R ·
  • 20 × 60″ · ISO/Gain: 100 · Optolong G ·
  • 20 × 60″ · ISO/Gain: 100 · Optolong B ·
  • 61 × 90″ · ISO/Gain: 100 · RGB zwo2600mc ·

Total exposure: 32 h 47 m

Comments

oeswww
My deepest respects, but I prefer hydrogen. Did you apply it without a mask? I wanted to add more hydrogen, but then the entire frame got a reddish tint. I'm not yet skilled in mask editing and don't know how to achieve that idea yet. Maybe it will turn out like yours.
Reply

Sign up or sign in to leave a comment.

RegisterSign in
CatSReply to oeswww
I’m not sure why the mask is there. To prevent the frame from turning red, continuum subtraction is done. I’m not sure if this is correct, but I did it like this: I subtracted red from hydrogen with a coefficient adjusted by eye. Then I stretched the hydrogen and mixed it into the red after stretching. I did the same with oxygen.
Reply

Sign up or sign in to leave a comment.

RegisterSign in
oeswwwReply to CatS
I followed a YouTube video from the PixInsight channel where they processed M101. I merged the hydrogen with the red channel in the RGB image, so to speak. Then I applied Linear Fit. Still, there was a slight red tint that only a mask could remove. In short, I followed this video: https://youtu.be/PWThcE8EzSQ?si=Zod9RUR5JF1UikR8
Reply

Sign up or sign in to leave a comment.

RegisterSign in

More photos by CatS