NGC 7023 in Cepheus (Wide Field)
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CLICK ON IMAGE FOR FULL SIZE VIEW Scope: ZenithStar 66 mm APO @ f/4.5 Location: Laguna Mountains, CA 18 July, 2009 Camera: Artemis285 Exposure: 11 x 7 min IR/UV Block, 8 x 3 min R, 4 x 3 min G, 2 x3 min B Exposures Processing: Images were captured with Artemis Capture (as FITs). Aligned/stacked and dark subtracted in Astroart with Sigma Combine. IR / UV Blocking filter and Color channels were scaled and color balanced in Astroart. Channels were co-registered in Astroart. Luminance construction consisted of the IR/UV blocking filter exposures. Curves and Levels applied in Photoshop to the Luminance construction to optimize object features. A light background noise reduction was applied to the luminance construction in Photoshop. Final LRGB combine was done in Photoshop using Luminance Layering. A light background noise reduction was again applied on the color image in PixInsight LE (SBNR). A light sharpening was applied to nebula regions. Final Image size is approximately 1092 x 1044. All exposures in this image were guided; North is up in this image. NGC 7023 is commonly known as the Iris Nebula. In this image of a wider field of the Iris Nebula, regions of interstellar dust can be seen.. Distance estimates vary but the approximate distance from Earth is about 1,400 light years. A close up image of the Iris Nebula was taken in 2006. The image can be seen here. The Horizontal FOV is 101'. Image center is located approximately - Equatorial 2000: RA: 20h 58m 10s Dec: +68°00'18"
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