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Pinwheel Galaxy (M101) from my light-polluted backyard
Posted By: Dan Paris, 05-22-2020, 01:03 AM

Hi,


M101 is a large and beautiful galaxy in Ursa Major. It was not so easy to bring out the faint outer arms from light pollution






Details:

GSO 200/800 Newtonian scope with GPU coma corrector on Vixen GPD2 mount
ZWO ASi 1600MM cooled monochrome camera with ZWO filter wheel, LRGB filters, off-axis guider and ASI 120MM mini guiding camera, everything run by ASIAIR
Luminance : 60*120 sec at gain 76
Chrominance : 10*120sec at gain 76 for each channel
60 darks, 20 flats for each filter (2 sec), 20 darks of flats
Preprocessing and stacking with Siril, processing with PixInsight, final touching up with Rawtherapee
Views: 597
05-22-2020, 04:02 AM   #2
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QuoteOriginally posted by Dan Paris Quote
GSO 200/800 Newtonian scope with GPU coma corrector on Vixen GPD2 mount ZWO ASi 600MM cooled monochrome camera with ZWO filter wheel, LRGB filters, off-axis guider and ASI 120MM mini guiding camera, everything run by ASIAIR Luminance : 60*120 sec at gain 76 Chrominance : 10*120sec at gain 76 for each channel 60 darks, 20 flats for each filter (2 sec), 20 darks of flats Preprocessing and stacking with Siril, processing with PixInsight, final touching up with Rawtherapee
Some great imagery from yourself...

But with these kind of technical details... for which I'd need to use Google Translate to try and even attempt to understand.



I'll stick to the old plain photography stuff.
05-22-2020, 03:25 PM   #3
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Another very nice pic. I can only admire your skill and hard work.
05-22-2020, 05:20 PM   #4
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I must say, "Most Impressive." I am grateful for all of the details as it helps to appreciate the hard work and obvious talents and gifts that are needed to accomplish such a feat. Many thanks for

sharing.

TT

05-23-2020, 04:33 AM   #5
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Wow! Excellent shot!
05-23-2020, 04:43 AM   #6
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Fabulous image! Wish I could get close to it with the K3 and GPS.
05-23-2020, 01:32 PM   #7
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QuoteOriginally posted by Kerrowdown Quote
But with these kind of technical details... for which I'd need to use Google Translate to try and even attempt to understand.
My eyes glaze over when reading the technical details, but not before they have enjoyed this wonderful image!

05-27-2020, 04:38 AM   #8
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Thanks Kerrowdown, PJ1, Tony, hjortron, Rob and Apet-Sure for your kind words.


(yes I do agree that the technical details are not very inviting...)
05-28-2020, 06:43 AM   #9
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Very impressive. I've never seen anything like that before. I do marvel at the universe we live in.
05-30-2020, 09:06 AM   #10
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QuoteOriginally posted by Dan Paris Quote
Hi,


M101 is a large and beautiful galaxy in Ursa Major. It was not so easy to bring out the faint outer arms from light pollution






Details:

GSO 200/800 Newtonian scope with GPU coma corrector on Vixen GPD2 mount
ZWO ASi 1600MM cooled monochrome camera with ZWO filter wheel, LRGB filters, off-axis guider and ASI 120MM mini guiding camera, everything run by ASIAIR
Luminance : 60*120 sec at gain 76
Chrominance : 10*120sec at gain 76 for each channel
60 darks, 20 flats for each filter (2 sec), 20 darks of flats
Preprocessing and stacking with Siril, processing with PixInsight, final touching up with Rawtherapee
Lovely. Well done, nice processing!
07-20-2021, 09:08 AM   #11
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QuoteOriginally posted by Dan Paris Quote
Hi,


M101 is a large and beautiful galaxy in Ursa Major. It was not so easy to bring out the faint outer arms from light pollution






Details:

GSO 200/800 Newtonian scope with GPU coma corrector on Vixen GPD2 mount
ZWO ASi 1600MM cooled monochrome camera with ZWO filter wheel, LRGB filters, off-axis guider and ASI 120MM mini guiding camera, everything run by ASIAIR
Luminance : 60*120 sec at gain 76
Chrominance : 10*120sec at gain 76 for each channel
60 darks, 20 flats for each filter (2 sec), 20 darks of flats
Preprocessing and stacking with Siril, processing with PixInsight, final touching up with Rawtherapee
NIc host! Love the amount of detail you captured!
07-20-2021, 10:01 AM   #12
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Nice capture!

---------- Post added 07-20-2021 at 12:05 PM ----------

QuoteOriginally posted by Dan Paris Quote
(yes I do agree that the technical details are not very inviting...)
On the other hand, as someone who has just started to dabble a little in astrophotography this gives me some terms to google and an idea or what can be achieved even in a somewhat light polluted area. For me the technical details are much appreciated.
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