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NGC 5248 in Bootes



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: +0851'38"


All images and content remain the property of Jim Thommes - copyright 2003 - 2019

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