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LBN 1122 in Libra



Scope: Explore Scientific MN152 Maksutov Newtonian at f/4.8, Location: DAA Observatory, Shelter Valley, CA,  27 May 2017  Camera: ST8300M (Baader LRGB filters)

Exposure: Exposure:  16 x 12 min (1x1 bin) exposure with IR/UV Block 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 IR/UV Blocking filter exposure stack was used for the luminance layer. Images processed at 3352 x 2532 resolution. Final Image size is approximately  2600 x 1950.

North is up in this image.   The main feature in this image is the LBN1122 nebula; this field is in the constellation of Libra. This nebula encompasses two of Lynds Dark Nebulae. This object is a weird combination of dust reflecting star light and star obscuration - there may even be some Hydrogen emission. Consequently there are entries in both bright and dark nebula catalogs. There are additional entries in the TGU and Dobashi Dark nebula catalogs roughly corresponding the the Lynds dark nebulae - but they are not indicated on the annotation. Cross identifications for LBN 1122 in other catalogs were not found. There are a number of background galaxies in this field - some are quite deep  up to 1.5 Billion LY by redshift estimate. The largest is PGC 55713 at 355 million light years distance in the upper right. It is part of a seven galaxy group [CHM2007] LDC 1137 - some of the sibling galaxies are seen in this field (those with similar redshift distance estimates).   These objects  as well as some bright stars are identified in the annotated image..  Horizontal FOV is 85'

Image center is located approximately - Equatorial 2000: RA: 15h 40m 40s Dec: -0709'37"


All images and content remain the property of Jim Thommes - copyright 2003 - 2017

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