NGC 4449 and NGC 4460
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CLICK ON IMAGE FOR FULL SIZE VIEW (3000x2250) 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: +44°28'25"
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