NGC281 - Emission Nebula in Cassiopeia


NGC 281 is an open star cluster associated with a relatively large emmision nebula (Sh2-184). This is another fine example of a star-forming region that glows in the red hue associated with exctited hydrogen atoms. The small, darker areas blocking the emmitted light are known as Bok globules.

This is known as the Pac-Man nebula because of its resemble to the video game character.

Telescopes: Color: Orion 120ED refractor
Ha: Takahshi TOA130 NFB
Camera: Color: Modified Canon XS (1000D) ;; ISO 800
Ha: SBIB ST-8300 with 12nm Astronomik filter
Mount: Losmandy G-11/ iOptron CEM60
Guiding: Orion SSAG on 50mm guide scope
Exposures: Color: 46 @ 5 min.
24 @ 7.5 min. (Ha)
Processing:  Color images were aligned and combined using ImagesPlus. Ha images were aligned and combined in CCDSoft. The color and Ha images were aligned in RegiStar. The composite image was created and adjusted in Photoshop. Topas Detail and DeNoise were applied.
Location: My backyard observatory in SE Minnesota. The color images were initially obtained in December of 2009. The Ha images were obtained on 9/4/2020.
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