LBN 1122 in Libra
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ON IMAGE FOR FULL SIZE VIEW (2600x1950)
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: -07°09'37"
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