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NGC 4449 and NGC 4460



Scope: Explore Scientific MN152 at f/4.8, Location: DAA Observatory, Shelter Valley, CA, 15 April 2020,  Camera: Atik 383L (Astronomik Gen 2 LRGB Filters)

Exposure: Exposure: 20 x 10 min  (1x1 bin) exposure with UV/IR block filter,  10 x 4 min (2x2 bin) each RGB exposures.

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Subframe calibration - Pixinsight. Subframe integration (Median combine -  Winsorized Sigma Clipping) - PixInsight.  Non-linear stretching and normalization  - PixInsight.  Curves, Levels, RGB combine, Luminance layering - PixInsight.  Final finishing  - Photoshop.  RGB calibration - eXcalibrator. Annotation - PixInsight, Aladin (Simbad and NED), and PhotoShop. This image is a  RGB combine with Luminance layering.  Images processed at resolution 3354x2529. Final Image size is approximately  3000x2250.

North is up in this image.  NGC 4449 is  the galaxy at the bottom center of this image. It is an irregular (Magellanic variety), barred galaxy (IBm). The upper part of the image shows a few other galaxies, notably NGC 4460, a barred edge-on spiral (SB0^+(s); UGC 7617 , a late stage edge-on spiral (Sd); and UGC 7593 which is really a merging pair of Sa type galaxies. There are a few Quasar objects ranging in redshift from 0.55179 to 2.00547. There is also a very low surface brightness galaxy just to the lower left of NGC 4449. The full size image has an image scale of 1.70 arcsec/pixel and shows the structure of these and a few other galaxies. NGC 4449 is about  is about 13.1 million light years distant. These objects and some of the brighter stars are identified in the annotated image. Horizontal FOV is approximately 88 arc minutes. Full size image scale is 1.70 arcsec/pix.

Image center is approximately - Equatorial 2000: RA: RA: 12h 28m 0s Dec: +4428'25"


All images and content remain the property of Jim Thommes - copyright 2003 - 2020

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