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Old 02-08-2023, 04:46 PM
Startrek (Martin)
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Location: Sydney and South Coast NSW
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M17 Swan ( Omega) Nebula under a Full Moon

Ive been abroad for a few months, just returned home , and with a couple of clear nights in Sydney, decided to dust off the rig and image M17.

Full Moon
Bortle 8
Sky Conditions , poor seeing
8” f5 Klaus Helmerich Carbon fibre Newt
Skywatcher EQ6-R pro mount
ZWO 2600MC cooled to -10C , Gain 101
Antlia ALPT 5nm Dualband filter
TS Optics GPU coma corrector
PHD2 Multistar guiding ( 0.75 to 1.0 arc sec ) guiding was poor due to conditions and seeing

95 x 3min dithered subs
40 x Flats
60 x Bias

Stacked in DSS
Processed in Startools v1.8
AutoDev, Bin 70% , Crop edges, NB Wipe , Final AutoDev, Sharpen, SV Decon , Superstructure, Noise reduction
Had to deal with a lot of gradients even with using the Antlia filter but ultimately using a OSC it alway gets back to how data you can capture, the more the better. Under Bortle 8 and full moon staring down the end of the OTA a OSC needs loads of good data to produce a reasonable low noise high fidelity image. This image fell way short ( the clouds have returned ) Maybe in a week or two I can add more data under darker moonless skies.

Synthetic Luminance version
Synthetic Luminance Crop version
Colour version SHO mapping

Comments welcome

Thanks
Attached Thumbnails
Click for full-size image (M17 Swan Nebula SHO Colour rev 3.jpg)
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Click for full-size image (M17 Swan Nebula Synthetic Luminance Final.jpg)
201.0 KB91 views
Click for full-size image (M17 Swan Nebula Synthetic Luminance Final Crop.jpg)
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  #2  
Old 02-08-2023, 06:00 PM
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strongmanmike (Michael)
Highest Observatory in Oz

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Ok, ok ...whoooo's addicted to this imaging game..?..huh? ...me neither

Meah an image is an image, nice, it fills a need, the capture process alone is cathartic...like something else I know..arhem...

Mike
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Old 03-08-2023, 10:09 AM
Dave882 (David)
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Location: PADSTOW
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Great to have you back Martin! Nice detail in your swan and super tight. Well done!
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Old 03-08-2023, 10:19 AM
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Retrograde (Pete)
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Nice work and welcome back.
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Old 03-08-2023, 12:31 PM
Startrek (Martin)
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Location: Sydney and South Coast NSW
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Thanks Mike , Dave and Pete
Glad to back in the best country in the world !!
I managed to scramble some sort of image out of poor data, the mounts guiding was chasing the seeing, only the odd excursion in Dec but Ra was see sawing a bit, round stars but every 5th frame or so stars are bloated along with resolution.The dew has been ridiculous in Sydney since I’ve been back , everything wet by 7pm
Looking forward to some dry westerly winds which usually arrive in August.
Seriously considering going Mono ( mainly for Sydney ) as OSC narrowband under Bortle 8 and a moon around is a damn struggle getting enough clean signal. Mono wins hands down under my conditions. Down south Mono would be unbelievably insane on my 10”
The Minister for finance ( Misses ) has approved the funds out of our retirement nest. Whoosh lucky me , sorry kids and grandkids

Thanks again
Cheers
Martin
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Old 03-08-2023, 12:39 PM
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strongmanmike (Michael)
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Quote:
Originally Posted by Startrek View Post
The Minister for finance ( Misses ) has approved the funds out of our retirement nest. Whoosh lucky me , sorry kids and grandkids
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