This image was particularly difficult to process, as it has an emission nebula and two major reflection nebulae. But I like the way it came out, as my idea was to show the contrast between IC2169 (Dreyer’s Nebula), a reflection nebula, and Sh2-273, the huge Cone/Foxfur nebula area.
- Exposures (-10ºC):
- H-alpha: 30×180s (gain=100)
- R, G, B: 60×90s each (gain=0)
- Total exposure time: 6 hours
- Taken from Doylestown, PA, Nov 20-21, 2022
- Telescope: Takahashi FSQ-106ED with f/3.67 reducer
- Camera: ZWO ASI2600MM-Pro with Astrodon filters (5 nm)
- Mount: iOptron CEM60
- Guiding: ZWO ASI174MM (off-axis)
- Acquisition: NINA + PHD2 and ASTAP
- Processing: AstroPixelProcessor, PixInsight
Deep-sky Imaging 