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Old 18-02-2024, 11:10 PM
Startrek (Martin)
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NGC 3324 Gabriela Mistral Nebula

Last week we had 2 consecutive clear moonless nights which is extremely rare in Summer. Captured NGC 3324 Gabriela Mistral Nebula which is located on one of the outer arms of Carina

Location : Sydney , Australia
Skies : Bortle 8 heavy light polluted skies
Conditions : Average to Good Seeing
New Moon
Very light SE wind
No Dew

Backyard semi permanent set up
Telescope : 8" f5 Klaus Helmerich Carbon Fibre Newt
Mount : Skywatcher EQ6-R Pro
Imaging Camera : ZWO 2600MM temp -10C , Gain 100
Coma Corrector : TS Optics GPU
Filter Wheel : ZWO 7 x 2"
Filters : Antlia 3nm Ha , Oiii and Sii
Guide Scope : Orion 60mm with helical focuser
Guide Camera : ZWO 120MM
45 x 3min subs Ha
40 x 3 min subs Oiii
44 x 3 min subs Sii
Darks from Library
Bias from Library
Flats for Ha, Oiii , Sii
Tracking and Goto : Eqmod and Stellarium
Aquisition : APT
Guiding : PHD2 ( 0.45 to 0.55 arc sec total rms avg )
Analysed , Calibrated and Stacked in ASTAP
Decided to process in an older version of Startools version 1.7 to see what sort of result I could achieve , I haven’t used 1.7 in 2 years. ( Data Sets loaded into Compose , Color SHO: HST preset with tweaks in all colours )

Produced 2 different SHO versions using the Startools matrix SHO presets
A Synthetic Luminance version which is the base image
And 2 Cropped images for pixel peeping

Total integration 6 hours

I decided to leave the Auto stretch as default and try to include as much nebulosity and detail as possible with the hours I had on this object.
The actual noise floor only required a 2 pixel de noise
Fairly pleased with the result

Framing could have been better , I chopped off a bit of Gabriela’s beehive hairdoo

Astrobin link for full resolution……
https://www.astrobin.com/ttfhzt/

Comments welcome
Thanks for looking

Clear Skies
Martin
Attached Thumbnails
Click for full-size image (NGC 3324 Gabriela Mistral Nebula SHO version 1A Final.jpg)
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Click for full-size image (NGC 3324 Gabriela Mistral Nebula SHO version 2A Final.jpg)
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Click for full-size image (NGC 3324 Gabriela Mistral Nebula Synthetic Luminance Final version 2.jpg)
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Click for full-size image (NGC 3324 Gabriela Mistral Nebula SHO version 1A Final Crop 1.jpg)
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Click for full-size image (NGC 3324 Gabriela Mistral Nebula SHO version 2A Final Crop 1.jpg)
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Old 19-02-2024, 11:33 AM
Dave882 (David)
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Gorgeous image Martin! Detailed and refined, expert processing like you’ve been shooting mono for years!! Great work mate!
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Old 19-02-2024, 04:37 PM
Startrek (Martin)
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Dave ,
Thanks for your encouraging comments
Whilst I’m reasonably happy with the image and the SHO colour palette , I think it looks a tad flat and need more contrast between the bright regions and shadows plus a little more colour saturation
I did rush this one through, so going to do a reprocess and see if I can marginally improve it
I know it’s only 6 hours of data but the data was pretty clean captured over those 2 nights

Thanks again
Martin
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