Image spcefications:
- Exposure: 13 hours HaO3 = 380:420
- Camera: SBIG ST-8300M, Filters: Astrodon 5 nm H-alpha, Astrodon 3nm O3
- Telescope: Televue 85 mm with field flattener focal distance 472mm
- Mount: Losmandy G11
- Guiding: SBIG Off Axisguider, Starlight Xpress Lodestar autoguider and PHD
- Location: Etolie St. Cyrice, France
- Date: 24, 25, 26 August 2019
Image acquisition with ImagesPlus 6.0 Camera Control:
- 19 H-alpha of 20 min, binned 1x1
- 21 O3 of 20 min, binned 1x1
- 20 Flat fields for each filter with flatfield panel
- 20 Dark frames of 20, 15 and 10 min
- 50 Bias frames
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