LBN 816 Region and LDN 1536
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CLICK ON IMAGE FOR FULL SIZE VIEW (2800x2100) Scope: FSQ-106N at f/5, Location: DAA Observatory, Shelter Valley, CA, 11 November 2018, Camera: Atik 383L (Astronomik Gen 2 LRGB Filters) Exposure:
Exposure: 16 x 12min (1x1 bin) exposure with UV/IR block filter, 8 x
4 min (2x2 bin) RGB
exposures.
Processing: Data
Collection - Sequence Generator Pro (as FITs). Exposure calibration,
LRGB registration, and stacking (Median combine - Winsorized Sigma
Clipping) - PixInsight. LRGB channel registration,
equalization and gradient removal - PixInsight. Curves, Levels, RGB
combine, Luminance layering - PixInsight. Final finishing -
Photoshop. RGB calibration - eXcalibrator. This image is a RGB combine
with Luminance layering. Images processed at 3352 x 2532 resolution. Final Image size is approximately
2800 x 2100. North is up in this image. The
large cloudy nebulosity in this image field is part bright nebula (LBN 816) and
dark nebulae (various). This field is part of the larger Taurus Molecular Cloud
(TMC) about 400 light years distant and is many times larger than this image
field. The most prominent dark nebula is LDN 1536 (mostly center) with
various other dark structures noted in the TGU, Dobashi, and PGCC (Planck Catalog of
Galactic Cold Clumps ).There are several background galaxies - the most notable
is LEDA 1671876 with a redshift distance estimate of 211 million light years -
others are annotated but have no distance estimates.
Toward the lower left is a faint reflection nebula that is noted in several
catalogs and also in the Magakian Merged Reflection Nebula catalog (seq. 77). There
are four TTau variable stars associated with this reflection structure. These objects and some
of the brighter stars are identified in the annotated
image. Horizontal FOV is approximately 120 arc minutes. Full size
image scale is 2.57 arcsec/pix. Image center is approximately - Equatorial 2000: RA: 04h 33m 56s Dec: +23°04'42"
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