NGC7000 in HαRGB - first light with ASI071 MC Cool (Uwe Deutermann)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: 62 ksi Cyg · B355 · B358 · NGC 6997 · NGC 7000 · North America nebula · Sh2-117 · The star ξCyg

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NGC7000 in HαRGB - first light with ASI071 MC Cool

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NGC7000 in HαRGB - first light with ASI071 MC Cool

I had the slim chance to take my first images with the ASI071MC and of course I had to take it. 2 hours of clear skies only, but it was long enough to get some 30 second images of the North America Nebula. Big problem using it with the RASA is to use a filter, and I cannot see right now how to do it. I would need an adapter that screws on the back end of the 2" filter down to an M42 size, and as far as I could see there was nothing like that available. I wonder about this, every 2" filter has a thread at the back side, but I am not even sure which size it is. If there would be a short adapter like that it would be perfect for the 26mm focal length that I have to achieve.

I also saw the problems that others had with this camera, dew was building up in the center of the sensor plate, which made the image fuzzy. Have to slow down the cooling I assume, I will need to do more test images.

One important part that I also wanted to find out was why the stars with the ASI1600 MM are so fuzzy! If that is a flaw of the Rasa I should have seen it as well with the ASI071, which I did NOT. The stars were pinpoint, no fuzziness around them at all. Hence the problem is down to either the ASI1600 or the filters, which I doubt. On the other hand, the ASI1600 produces nice stars when using the Explore Scientific refractor. I am puzzled!

This image is a composition of the Hα version with the ASI1600 MM and the ASI071 MC. I used the RGB data to obtain the star colors, while the Hα filled in the red channel by 20%.

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ZWO ASI1600MM/QHY163M
Narrowband imaging
Celestron RASA

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Status	Advanced success
Started	...
Astrometry.net job	3246597
PixInsight job	3JRY7SMZ7TDJ4LODRFYPMVKZJJZWSSHN
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	21h00m23s.23
RA (top/left)	21h06m34s.70
RA (top/right)	20h54m19s.30
RA (bottom/right)	20h54m22s.20
RA (bottom/left)	21h06m16s.92

Dec (center)	+43°58′40″.4
Dec (top/left)	+44°47′03″.7
Dec (top/right)	+44°48′49″.2
Dec (bottom/right)	+43°08′59″.2
Dec (bottom/left)	+43°07′15″.7

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NGC7000 in HαRGB - first light with ASI071 MC Cool

NGC7000 in HαRGB - first light with ASI071 MC Cool

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NGC7000 in HαRGB - first light with ASI071 MC Cool

NGC7000 in HαRGB - first light with ASI071 MC Cool

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