Sh2-232 sits in a neglected region of Auriga, not far from the commonly imaged IC410 and IC405. In order from left to right, they are Sh2-232, 235, 231, and 233. I think they look like a giant eyeball and two kidneys, so maybe that’s why they are rarely imaged. (It could also be that they are really faint!) The tiny planetary in the middle of Sh2-232 is PK173+03.1. Interestingly, I can’t find any designation for the huge round nebula at bottom-right.
- Exposures (-10ºC, gain=100):
- H-alpha: 93×180s
- SII: 69×180s
- OIII: 94×180s
- Total exposure time: 12 hours 48 minutes
- Taken from Doylestown, PA, Nov 13-19, 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
The individual narrowband channels are shown below.
Deep-sky Imaging 