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M81 from Paris suburbs with rather good seeing (8" Newtonian on AP900)

Dan_Paris #92492 Thanks Carl ! Janvry is actually not too far from my home, but in a more rural setting. clear skies, Dan toggle quoted message Show quoted text On Thu, Feb 2, 2023 at 11:00 AM, Carl Björk wrote: On Tue, Jan 31, 2023 at 11:59 PM, Dan_Paris wrote: Hi, last night, for the first time in several months, the sky was clear AND the seeing conditions were rather good over Paris (with low transparency and strong moonlight however). When I started autoguiding and looked at the autoguiding curves flat like a pankake I was really thrilled ! I acquired 4 hours of luminance with an ASI183mm (at 0.67"/pix). The median FWHM 2.04" after stacking. The chrominance is from last year with the ASI1600mm. Here's a link to the full resolution picture. Thanks for looking and clear skies, Dan Technical details 200/800 custom Newtonian astrograph with Romano Zen optics and carbon fiber tube AP900 CP4 mount on Losmandy HD tripod TS 2.5" Riccardi-Wynne corrector ZWO LRGB filters Guiding : ZWO OAG + ASI120mm mini + AsiairV1 Luminance : 240 60sec with the ASI183mm Chrominance : 4060sec for each R, V and B filter with the ASI1600mm Conditions : Bortle 7/8 skies in Paris' suburbs (20km from the Eiffel tower), decent seeing, gibbous moon, lot of humidity Processing with Pixinsight Reply
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Carl Björk #92457 Hi Dan, Very nice, thanks for sharing :-) I am glad you indicated Bortle class as I was wondering. I remember visiting a friend of mine in Janvry and was amazed (agréablement supris) with the sky quality so close from Paris. Cheers from a "neighbor" in Lausanne and CS ! Carl toggle quoted message Show quoted text On Tue, Jan 31, 2023 at 11:59 PM, Dan_Paris wrote: Hi, last night, for the first time in several months, the sky was clear AND the seeing conditions were rather good over Paris (with low transparency and strong moonlight however). When I started autoguiding and looked at the autoguiding curves flat like a pankake I was really thrilled ! I acquired 4 hours of luminance with an ASI183mm (at 0.67"/pix). The median FWHM 2.04" after stacking. The chrominance is from last year with the ASI1600mm. Here's a link to the full resolution picture. Thanks for looking and clear skies, Dan Technical details 200/800 custom Newtonian astrograph with Romano Zen optics and carbon fiber tube AP900 CP4 mount on Losmandy HD tripod TS 2.5" Riccardi-Wynne corrector ZWO LRGB filters Guiding : ZWO OAG + ASI120mm mini + AsiairV1 Luminance : 240 60sec with the ASI183mm Chrominance : 4060sec for each R, V and B filter with the ASI1600mm Conditions : Bortle 7/8 skies in Paris' suburbs (20km from the Eiffel tower), decent seeing, gibbous moon, lot of humidity Processing with Pixinsight
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Dan_Paris #92452 Thanks Benoit!
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Dan_Paris #92451 Thanks Stuart!
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Dan_Paris #92450 Thanks a lot Roland! Dan
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Dan_Paris #92449 Thanks Karen! It is not the thoughest target from my place, as it is rather contrasty. Dan
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Benoit Schillings #92430 amazing toggle quoted message Show quoted text On Tue, Jan 31, 2023 at 4:28 PM Stuart <stuart.j.heggie@...> wrote: Outstanding Dan!!! Stuart Heggie http://www.stuartheggie.com/ On Tue, 31 Jan 2023 at 17:59, Dan_Paris <danysra@...> wrote: Hi, last night, for the first time in several months, the sky was clear AND the seeing conditions were rather good over Paris (with low transparency and strong moonlight however). When I started autoguiding and looked at the autoguiding curves flat like a pankake I was really thrilled ! I acquired 4 hours of luminance with an ASI183mm (at 0.67"/pix). The median FWHM 2.04" after stacking. The chrominance is from last year with the ASI1600mm. Here's a link to the full resolution picture. Thanks for looking and clear skies, Dan Technical details 200/800 custom Newtonian astrograph with Romano Zen optics and carbon fiber tube AP900 CP4 mount on Losmandy HD tripod TS 2.5" Riccardi-Wynne corrector ZWO LRGB filters Guiding : ZWO OAG + ASI120mm mini + AsiairV1 Luminance : 240 60sec with the ASI183mm Chrominance : 4060sec for each R, V and B filter with the ASI1600mm Conditions : Bortle 7/8 skies in Paris' suburbs (20km from the Eiffel tower), decent seeing, gibbous moon, lot of humidity Processing with Pixinsight
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Stuart #92427 Outstanding Dan!!! Stuart Heggie http://www.stuartheggie.com/ toggle quoted message Show quoted text On Tue, 31 Jan 2023 at 17:59, Dan_Paris <danysra@...> wrote: Hi, last night, for the first time in several months, the sky was clear AND the seeing conditions were rather good over Paris (with low transparency and strong moonlight however). When I started autoguiding and looked at the autoguiding curves flat like a pankake I was really thrilled ! I acquired 4 hours of luminance with an ASI183mm (at 0.67"/pix). The median FWHM 2.04" after stacking. The chrominance is from last year with the ASI1600mm. Here's a link to the full resolution picture. Thanks for looking and clear skies, Dan Technical details 200/800 custom Newtonian astrograph with Romano Zen optics and carbon fiber tube AP900 CP4 mount on Losmandy HD tripod TS 2.5" Riccardi-Wynne corrector ZWO LRGB filters Guiding : ZWO OAG + ASI120mm mini + AsiairV1 Luminance : 240 60sec with the ASI183mm Chrominance : 4060sec for each R, V and B filter with the ASI1600mm Conditions : Bortle 7/8 skies in Paris' suburbs (20km from the Eiffel tower), decent seeing, gibbous moon, lot of humidity Processing with Pixinsight
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Roland Christen #92424 Your full res pix is awesome. Rolando toggle quoted message Show quoted text -----Original Message----- From: Dan_Paris <danysra@...> To: main@ap-gto.groups.io Sent: Tue, Jan 31, 2023 4:59 pm Subject: [ap-gto] M81 from Paris suburbs with rather good seeing (8" Newtonian on AP900) Hi, last night, for the first time in several months, the sky was clear AND the seeing conditions were rather good over Paris (with low transparency and strong moonlight however). When I started autoguiding and looked at the autoguiding curves flat like a pankake I was really thrilled ! I acquired 4 hours of luminance with an ASI183mm (at 0.67"/pix). The median FWHM 2.04" after stacking. The chrominance is from last year with the ASI1600mm. Here's a link to the full resolution picture. Thanks for looking and clear skies, Dan Technical details 200/800 custom Newtonian astrograph with Romano Zen optics and carbon fiber tube AP900 CP4 mount on Losmandy HD tripod TS 2.5" Riccardi-Wynne corrector ZWO LRGB filters Guiding : ZWO OAG + ASI120mm mini + AsiairV1 Luminance : 240 60sec with the ASI183mm Chrominance : 4060sec for each R, V and B filter with the ASI1600mm Conditions : Bortle 7/8 skies in Paris' suburbs (20km from the Eiffel tower), decent seeing, gibbous moon, lot of humidity Processing with Pixinsight -- Roland Christen Astro-Physics
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Karen Christen #92422 Very pretty, Dan! I’m regularly impressed with the results you get from Paris. Karen AP toggle quoted message Show quoted text From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Dan_Paris Sent: Tuesday, January 31, 2023 4:59 PM To: main@ap-gto.groups.io Subject: [ap-gto] M81 from Paris suburbs with rather good seeing (8" Newtonian on AP900) Hi, last night, for the first time in several months, the sky was clear AND the seeing conditions were rather good over Paris (with low transparency and strong moonlight however). When I started autoguiding and looked at the autoguiding curves flat like a pankake I was really thrilled ! I acquired 4 hours of luminance with an ASI183mm (at 0.67"/pix). The median FWHM 2.04" after stacking. The chrominance is from last year with the ASI1600mm. Here's a link to the full resolution picture. Thanks for looking and clear skies, Dan Technical details 200/800 custom Newtonian astrograph with Romano Zen optics and carbon fiber tube AP900 CP4 mount on Losmandy HD tripod TS 2.5" Riccardi-Wynne corrector ZWO LRGB filters Guiding : ZWO OAG + ASI120mm mini + AsiairV1 Luminance : 240 60sec with the ASI183mm Chrominance : 4060sec for each R, V and B filter with the ASI1600mm Conditions : Bortle 7/8 skies in Paris' suburbs (20km from the Eiffel tower), decent seeing, gibbous moon, lot of humidity Processing with Pixinsight -- Karen Christen Astro-Physics
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Dan_Paris #92421 Hi, last night, for the first time in several months, the sky was clear AND the seeing conditions were rather good over Paris (with low transparency and strong moonlight however). When I started autoguiding and looked at the autoguiding curves flat like a pankake I was really thrilled ! I acquired 4 hours of luminance with an ASI183mm (at 0.67"/pix). The median FWHM 2.04" after stacking. The chrominance is from last year with the ASI1600mm. Here's a link to the full resolution picture. Thanks for looking and clear skies, Dan Technical details 200/800 custom Newtonian astrograph with Romano Zen optics and carbon fiber tube AP900 CP4 mount on Losmandy HD tripod TS 2.5" Riccardi-Wynne corrector ZWO LRGB filters Guiding : ZWO OAG + ASI120mm mini + AsiairV1 Luminance : 240 60sec with the ASI183mm Chrominance : 4060sec for each R, V and B filter with the ASI1600mm Conditions : Bortle 7/8 skies in Paris' suburbs (20km from the Eiffel tower), decent seeing, gibbous moon, lot of humidity Processing with Pixinsight
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