Sh2-290 is a very faint planetary nebula in Cancer.
Hover over the picture for an annotated version
Date: 14 February 2024, 17 and 22 April 2025
FOV: Cropped to 69' × 46'; the angular size of Sh2-290 is about 16'
Telescope: Stellarvue SVX102T + SFFX-1 flattener (714mm, f/7)
Guiding: ZWO ASI120MM mini mono guide camera,
Stellarvue F050G 50mm guide scope
Computer: ASIair pro Raspberry Pi
Mount: iOptron CEM40
14 February 2024, 46 frames
Camera: ZWO ASI071MC Pro Cooled (-10°C) Color CMOS, gain 240
Filter: Optolong L-Ultimate dual narrow band filter
17 April 2025, 26 frames
Camera: ZWO ASI6200MC Pro Cooled (-10°C) Color CMOS, gain 300
Filter: Optolong L-Ultimate dual narrow band filter
22 April 2025, 43 frames
Camera: ZWO ASI6200MC Pro Cooled (-10°C) Color CMOS, gain 300
Filter: Optolong UV-IR cut filter
Stacking: three separate frames using Pixinsight
forty-six 240 second frames 14 Feb 2024 ASI071MC L-Ult
twenty-six 240 second frames 17 Apr 2025 ASI6200MC L-Ult
forty-three 240 second frames 22 Apr 2025 ASI6200MC UV-IR cut
Calibration: 20 darks, 20 flats, and 20 dark flats per session
Total Time: 7 hours 40 minutes
Processing: Pixinsight – sessions registered with StarAlignment
SPCC, DBE, SPCC, BlurXT, NoiseXT → linear, HTS, GHS, MStr,
PMath 0.5*MStr + 0.3*GHS + 0.2*HST → Stars, Sat
linear, StarXTerminator, HTS, GHS, MStr,
PMath 0.5*MStr + 0.3*GHS + 0.2*HST → Starless, HDRMST_PhLm646,
PMath ScreenBlend (Stars Sat, Starless) → Final
Location: Stony Creek Boat Launch near Henderson, NY, 14 Feb 2024
and Darling Hill Observatory near Vesper, NY, 17 and 22 Apr 2025
