NGC 5248 in Bootes
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ON IMAGE FOR FULL SIZE VIEW
(2800x2100)
Scope:
Celestron 9.25 Edge 235 mm at f/7, Location: DAA Observatory, Shelter Valley CA,
2 May 2019
Camera: ST8300M (Baader LRGB filters)
Exposure: 16 x 12 min (2x2 bin) exposure with IR/UV Block filter, 10 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. Annotation - PixInsight, Aladin (Simbad/NED), and 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
dominant galaxy in this image is NGC 5248. It is classified SAB(rs)bc -
barred galaxy with spiral and ring features. It is about 39 to 49 million light
years distant. NGC 4559 is a member of the Virgo Galaxy Cluster. Also in this image are galaxies
PGC 48114, PGC 48090, and UGC 08575 (also a member of the Virgo Cluster) and PGC
48114 is a Seyfert Galaxy. There are numerous other background galaxies in this
image - these galaxies range in distance from 303 to 2,902 million light
years. Also in this image field are three galaxy groups - presumably fairly
distant but no distance estimates are available. These galaxies, galaxy groups, and some of the brighter
stars are identified in the annotated
image.. Horizontal FOV is
approximately 38 arc minutes (0.81 arcsec/pix image scale on the full size
image). Image center is located approximately - Equatorial 2000: RA: 13h 36m 44s Dec: +08°51'38"
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