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LDN 1622 in Orion



Scope: Explore Scientific MN152  Maksutov Newtonian at f/4.8, Location: Blair Valley, Anza Borrego Desert, CA   17 January 2015  Camera: ST8300M

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

Processing: Data Collection -  Sequence Generator Pro (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 blended with H-Alpha for the Luminance channel. Red and H-Alpha are blended for the red channel and then a LRGB combine with Luminance layering.  Saturation in LAB color.   Final Image size is approximately 3352x2532 resized to 2600x1950.

North is to the left in this image.  This field  is dominated by the large LDN 1622 Dark Nebula. This is a shapely structure that has evoked two  common names  - sometimes known as the "Boogeyman" and sometimes known as the "Dancing Dolphin". Less dominant is dark nebula LDN 1621 on the left. There are two van den Bergh reflection nebulae in this field, vdB 62 and vdB 63. The bright star between LDN 1622 and 1621 is HD 39715 that is a high proper motion star of about 650 mas/yr. Finally there are other dark nebula structures. These objects are highlighted in the annotated image.  The star HD 39715 is approximately 86 light years distant from Earth; vdB 63 is approximately 145 light years distant. This image replaces and earlier image that can be found in the archives here. The star Horizontal FOV is 88'

Image center is approximately - Equatorial 2000: RA: 05h 55m 03s Dec: +0154'24" 



All images and content remain the property of Jim Thommes - copyright 2003 - 2015 copyright 2003 - 2012

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