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[ap-ug] Glazed Donut

Pete Lardizabal #82980 👍🏻👍🏻👍🏻👍🏻👍🏻 😎 Pete toggle quoted messageShow quoted text On Nov 16, 2021, at 2:40 PM, Roland Christen via groups.io <chris1011@...> wrote: Hello Astronuts, This is image #2 from my Hawaiian observatory. The image consists of 60 x600 sec LRGB subs. Imaging scope was the 175EDF at F7.5 (no flattener or compressor, just straight on). To me it looks like a glazed donut, but it's also known as the Spare Tire Nebula. :^)) What's interesting is that there are no dust defects visible in the image, even though I did not use any flats. They are there, but just not visible because the sky is so dark in Hawaii that there was essentially no background flux. I did get several satellite trails in the red subs early in the morning. Median combine did a fair job of minimizing them https://www.astrobin.com/p8jrgv/0/ Rolando
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Jeff B #82984 Pretty cool Roland. Yeah it does look like a glazed donut. Now I'm hungry. BTW, I had fun searching out all the faint galaxies you also captured. That's pretty cool too. Jeff toggle quoted messageShow quoted text On Tue, Nov 16, 2021 at 5:51 PM Pete Lardizabal <p14@...> wrote: 👍🏻👍🏻👍🏻👍🏻👍🏻 😎 Pete On Nov 16, 2021, at 2:40 PM, Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote: Hello Astronuts, This is image #2 from my Hawaiian observatory. The image consists of 60 x600 sec LRGB subs. Imaging scope was the 175EDF at F7.5 (no flattener or compressor, just straight on). To me it looks like a glazed donut, but it's also known as the Spare Tire Nebula. :^)) What's interesting is that there are no dust defects visible in the image, even though I did not use any flats. They are there, but just not visible because the sky is so dark in Hawaii that there was essentially no background flux. I did get several satellite trails in the red subs early in the morning. Median combine did a fair job of minimizing them https://www.astrobin.com/p8jrgv/0/ Rolando
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Roland Christen #82989 BTW, I had fun searching out all the faint galaxies you also captured. What did you find? How faint? Roland -----Original Message----- From: Jeff B <mnebula946@...> To: main@ap-gto.groups.io Cc: main@ap-ug.groups.io Sent: Tue, Nov 16, 2021 7:15 pm Subject: Re: [ap-gto] [ap-ug] Glazed Donut Pretty cool Roland. Yeah it does look like a glazed donut. Now I'm hungry. BTW, I had fun searching out all the faint galaxies you also captured. That's pretty cool too. Jeff On Tue, Nov 16, 2021 at 5:51 PM Pete Lardizabal <p14@...> wrote: 👍🏻👍🏻👍🏻👍🏻👍🏻 😎 Pete On Nov 16, 2021, at 2:40 PM, Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote: Hello Astronuts, This is image #2 from my Hawaiian observatory. The image consists of 60 x600 sec LRGB subs. Imaging scope was the 175EDF at F7.5 (no flattener or compressor, just straight on). To me it looks like a glazed donut, but it's also known as the Spare Tire Nebula. :^)) What's interesting is that there are no dust defects visible in the image, even though I did not use any flats. They are there, but just not visible because the sky is so dark in Hawaii that there was essentially no background flux. I did get several satellite trails in the red subs early in the morning. Median combine did a fair job of minimizing them https://www.astrobin.com/p8jrgv/0/ Rolando -- Roland Christen Astro-Physics
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