Thors Helmet (NGC 2359) second attempt

Back in 2021 I imaged and processed NGC 2359. The interesting features of this Wolf-Rayet nebula were quite nice, but the weaker parts were invisible: NGC 2359 – Thor’s Helmet in narrow band during Full-Moon

So i started a new imaging run with higher magnification (1320mm instead of 564mm) and more sensitive camera. The resulting image of almost 13 hours data shows a lot more of the surrounding and weak features, even though, the same imaging location was used. The same Bortle 6-7 location was used, observing low above the light cone of the city.

Image data:
Date: 2024-01-10 – 2024-01-27
Location: Graz, Austria
Telescope: TS 256mm f/5 Newtonian with 1.06x ES HR coma corrector (equals to 1320mm focal length)
Camera: QHY268M @ -10C
Filters: Optolong LRGB, Baader H-alpha, O-iii
Guiding: PHD2 off-axis guider (ASI485)
H-alpha: 30x600s
O-iii: 24x600s
L: 116x60s
R: 24x120s
G: 18x120s
B: 18x120s

NGC 2359 – Thor’s Helmet in narrow band during Full-Moon

Even though the moon was at its brightest, I had to capture some light during the current phase of perfect weather. So I aimed for a rather dim nebula – Thor’s Helmet. I could capture a total of 124x300s images, which I combined to this nice result…

Image data:
Date: 2021-02-27 – 2021-03-01
Location: Graz, Austria
Telescope: 102mm f/7 APO with 0.79x flattener (equals to 564mm focal length)
Camera: QHY183C @ -30C
Filters: Baader H-alpha, O-iii and IDAS LPS-D2
Guiding: MGEN-II with off-axis guider
Exposures: 67x300s H-alpha, 33x300s O-iii

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