LBN 32, 35, 39 in Ophiuchus
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CLICK ON IMAGE FOR FULL SIZE VIEW (2600x1950) Scope: FSQ-106N at f/5, Location: DAA Observatory Shelter Valley, Anza Borrego Desert, CA 27 May 2017 Camera: Atik 383L (Astronomik Gen 2 Ha LRGB Filters) Exposure:
Exposure: 14 x 9 min (1x1 bin) exposure with UV/IR block, 12 x 8 minutes
(2x2 bin) exposure with Hydrogen Alpha filter, 8 x 4 min (2x2 bin) RGB
exposures.
Processing: Data
Collection - Sequence Generator Pro (as FITs). Calibrated, stacked
(Kappa Sigma Combine) - Deep Sky Stacker. LRGB channel registration,
equalization, and gradient removal - Astroart. Curves, Levels, RGB
combine - ImagesPlus. Luminance Layering, final stretch, and finishing -
Photoshop. RGB calibration - eXcalibrator. This image is a RGB combine
with Luminance layering. Color saturation in LAB color. The H-Alpha
filter exposure was screen blended into the IR/UV Blocking filter exposure stack
and used for the
luminance layer. Ha was screen blended into the Red channel - emission
balance of RGB done with Channel Mixer in Photoshop. Images processed at 3352 x 2532 resolution. Final Image size is approximately
2600 x 1950. North is up in this image. This
field contains emission nebulosity in the constellation of Ophichus. The bright
portion of emission nebulosity is LBN 35. Two other (but dimmer) Lynds Bright
Nebulae are also in this field - LBN 32 and LBN 39. The dark nebula
intermixed with LBN 35 is known asLDN 238. This dark nebula is also a molecular
cloud with the designation of MBM 139. These objects and some
of the brighter stars are identified in the annotated
image. Horizontal FOV is approximately 120 arc minutes. Image center is approximately - Equatorial 2000: RA: 16h 34m 57s Dec: -08°30'30"
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