Sharpless 187 in Cassiopeia
CLICK ON IMAGE FOR FULL SIZE VIEW (2400x1800)
Scope: Explore Scientific MN152 Maksutov Newtonian at f/4.8, Location: Blair Valley, Anza Borrego Desert, CA 14 November and 12 December 2015 Camera: ST 8300M
Exposure: Exposure: 21 x 8 min (1x1 bin) exposure with UV/IR block, 10 x 10 min (2x2 bin) H-Alpha exposures, 8 x 4.5 min (2x2 bin) RGB exposures.
Processing: Data Collection - Sequence Generator Pro (as FITs). Calibrated (Darks, Flats, Bias), stacked (Kappa Sigma Combine) Deep Sky Stacker, LRGB channel registration, equalization - Astroart. Curves, Levels, RGB combine ImagesPlus. Luminance layering and finishing - Photoshop. This image is a Ha LRGB combine with Luminance layering. The H-Alpha exposure stack was screen blended to the Luminance exposures to form the Luminance layer. Color saturation in LAB color; Final Image size is approximately 2400x1800.
North is to the left in this image. Central in this image is the emission nebula structure cataloged Sharpless 187; also known as Lynds Bright 630. This emission structure has a fairly rich starfield and there are several Dark Nebula structures. Several are from Lynds Dark Nebula Catalog (LDN 1316, 1317, 1319, 1322, 1323) all toward the right of Sharpless 187. The Dobashi Dark Nebula Catalog is more extensive in this field with eight cataloged items. These objects and some of the brighter stars are identified in the annotated image. This image replaces an earlier image that can be seen in the Archives here. Horizontal FOV is 85'
Image center is approximately - Equatorial 2000: RA: 01h 21m 44s Dec: +61°49'13"
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