LBN 748 in Perseus
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ON IMAGE FOR FULL SIZE VIEW (2800x2100)
Scope:
Explore Scientific MN152 Maksutov Newtonian at f/4.8, Location: DAA
Observatory, Shelter Valley, CA, 11 November 2018
Camera: ST8300M (Baader LRGB filters) Exposure:
Exposure: 16 x 12 min (2x2 bin) exposure with IR/UV Block filter, 8 x 5 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
main object in this image is LBN 748. It is somewhat dim for a bright nebula (4
of 6 scale, 1=brightest). There are several interesting smaller or background
objects in this field. The planetary nebula IC 351 is in the lower right -
though at this image scale it looks not much different from that of a deep blue
star. Additionally, the are a few background galaxies - UGC 02885 and
several of its companion galaxies, as well as galaxies UGC 02868, 02886, 02887.
There is also a distant galaxy cluster (1.728 billion light years by redshift
estimate). These objects and some bright stars are identified in the annotated
image.. Horizontal FOV is
approximately 88 arc minutes (1.88 arcsec/pix image scale on the full size
image). Image center is located approximately - Equatorial 2000: RA: 03h 50m 48s Dec: +35°25'49"
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