Thursday, September 25, 2025

NGC 6781, Helix Nebula, Uranus and moons, C/2025 A6 (Lemmon)

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NGC 6781: 75 mins of  5 min SHO subs imaged with an ASI 533MM Pro camera attached to an Altair 60EDF doublet refractor fitted with a 0.8 x FR. NGC 6781 is also known as the “Snowglobe Nebula” and is located in the equatorial constellation of Aquila, about 2.5° east-northeast of 5th magnitude star 19 Aquilae. I integrated and processed the data in Pixinsight and Adobe Lightroom. I like how the colourful planetary nebula is on its own centre field amidst a sea of clouds and black dust in this dense area of the milky Way. 


Helix Nebula: 105 mins of SHO subs imaged with an ASI 533MM Pro camera attached to an Altair 60EDF doublet refractor fitted with a 0.8 x FR which I integrated and processed in Pixinsight and Adobe Lightroom. The Helix nebula is one of the nearest planetary nebulas to Earth, lying in the constellation of Aquarius at a distance of 650 LY.


 

Uranus and moons: A 13 min integration of 30s RGB subs imaged with an ASI 533MM Pro camera attached to an Altair 60EDF doublet refractor fitted with a 0.8 x FR which I integrated and processed in Pixinsight and Adobe Lightroom; cropping the image to show the tiny pale blue planet better.


C/2025 A6 (Lemmon): 14 mins of 60s subs taken prior to dawn at 05:30 with an ASI 533MM Pro camera attached to an Altair 60EDF doublet refractor fitted with a 0.8 x FR which I integrated and processed in Pixinsight and Adobe Lightroom. Conditions were really clear when this was taken at 05:30 this morning. As my ZWO RGB filters are par focal, I just focused on red and kept the focus for the green and blue captures in order to reduce the amount of capture time to reduce image smearing.


Chris Bowden

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