Object: Rosette Nebula and SH2-280 in Monoceros (December 2023)
This is a widefield capture in Monoceros (the Unicorn) showing the primary targets: The Rosette Nebula and SH2-280
Some of the objects in the field:
- Rosette Nebula (left side of frame)– Multi-part emission nebula about 5200 light years distant.
- SH2-280 (right side of frame) -emission nebula about 5500 light years distant
- NGC2244 - The open cluster within the Rosette nebula
- NGC 2237 – Part of the nebulous region (Also used to denote whole nebula)
- NGC 2238 – Part of the nebulous region
- NGC 2239 – Part of the nebulous region (Discovered by John Herschel)
- NGC 2246 – Part of the nebulous region
- NGC2252 – Open cluster – 2934 light years distant


- Acquisition Date: 12/13/2023 to 12/16/2023
- Location: Western Massachusetts, USA
- Imaging Camera: QHY600PH-M -10°C - Mode 1(High Gain) Offset:15 Gain:56
- Telescope: Takahashi FSQ106EDXIII @ f/5 (530mm focal length - 106mm aperture)
- Mount: Astro-Physics AP1100 w/GTO4
- Guide scope: Celestron Off Axis Guider
- Guide Camera: ASI174m mini
- Software: Adobe Photoshop CS5, Sequence Generator Pro, PixInsight 1.8 Ripley, Aries Astro Pixel Processor

Filters:
- Chroma Ha 3nm 50mm
- Chroma OIII 3nm 50mm
- Astrodon SII 3nm 50mm
- Astrodon Gen II E 50mm Filters (RGB)


Exposure Times:
- Hydrogen Alpha (Ha): 36 x 10min. (360min) bin 1x1
- Oxygen III (OIII):34 x 10min. (340min) bin 1x1
- Sulfur II (SII) 33 x 10min. (330min) bin 1x1
- Red: 10 x 120 sec (20 min)
- Green: 10 x 120 sec (20 min)
- Blue: 10 x 120 sec (20 min)

Total Exposure:1090 min. (18.17hrs)

Sky Quality:
-Magnitude: 19.71
-Bortle Class 5
-1.41 mcd/m^2 Brightness
-1234.6 ucd/m^2 Artificial Brightness

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