NGC7822 (CloseUp, Narrowband)

[Reprocessed] This has been a challenging target. As usual the weather has not been cooperating for the last couple of months, so initially I was only getting a few hours of clear skies here and there. I also had to discard a lot of subs due to low clouds/fog, etc..., so I was very close to giving up at one point. Luckily, I had a few clear(ish) nights over the last week and managed to get overall >23 hours integration time with different filters. All is well that ends well!! :-)

 

* Telescope: William Optics FLT132 w/ Flat8 0.72x reducer

* Camera: ZWO ASI2600MC Pro cooled colour camera

* Filters: Optolong L-Ultimate 3nm dualband (Ha & Oiii), Antlia ALP-T 5nm dualband (Ha & Oiii) and Antlia ALP-T 5nm dualband (Hb & Sii)

* Mount: ZWO AM5 with ASIAir Plus

* Integration: 23h18m

* Post-Processing: PixInsight + Affinity Photo 2

 

I didn't think the Hb + Sii filter would get much signal, but at 10 minutes subs, I was able to see the contour of the core of the nebula in reddish (Sii) and the inside in blue (Hb). So, I'm glad I dedicated some time to the Hb+Sii filter.

 

More acquisition details in Astrobin: astrob.in/437k1m/J/

 

Clear Skies!!

 

========

Some basic info on NGC7822 from Wikipedia:

 

NGC 7822 is a young star forming complex in the constellation of Cepheus approximately 2,935 light years away. The complex encompasses the emission region designated Sharpless 171, and the young cluster of stars named Berkeley 59. The complex is believed to be some 800–1000 pc distant, with the younger components aged no more than a few million years.

 

=====

 

Thanks for looking.

Clear Skies

Done