LDN 1217 in Cepheus

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Scope: Explore Scientific MN152  Maksutov Newtonian at f/4.8, Location: Laguna Mountains, CA   27 June 2014  Camera: ST8300M

Exposure: Exposure: 16 x 10 min  (1x1 bin) exposure with UV/IR block,  8 x 4.5 min (2x2 bin) RGB exposures.

Processing: Data Collection -  CCDSoft (as FITs).  Calibrated, stacked (Sigma Kappa Combine) in Deep Sky Stacker, L - RGB channel registration, equalization, central gradient removal - Astroart.  Curves, Levels, and Luminance development, RGB combine - Images Plus. Finishing  - Photoshop. Color calibration with eXcalibrator. This image is UV/IR Block for the Luminance channel and then a LRGB combine with Luminance layering.  Saturation in LAB color.   Final Image size is approximately 3352x2532 resized to 2400x1800.

North is to the left in this image.  The long extended dark nebula central in this 88 arc minute image is generally known as LDN 1217 (parts of this structure have other designations - LDN 1219, TGU H696, vdB 152). Also in this image is an interesting reflection nebula (GN 22.17.7) in the lower left . This field is in the constellation of Cepheus. The annotated image identifies these nebulae as well as some of the brighter stars and a small background galaxy.  Distances to bright stars in this image are: HD 210902 - 137 light years; HD 210952 - 668 light years; HD 210884 - 107 light years. Reflection nebula vdB 152 is 1,300 light years. Horizontal FOV is 88'

Image center is approximately - Equatorial 2000: RA: 22h 13m 36s Dec: +70°42'25"

All images and content remain the property of Jim Thommes - copyright 2003 - 2014

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