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NGC 3184 in Ursa Major

 

CLICK ON IMAGE FOR FULL SIZE VIEW (2800x2100)

Scope: Celestron 9.25 Edge 235 mm at f/7, Location: DAA Observatory, Shelter Valley, CA,  16 Feb 2018  Camera: ST8300M (Baader LRGB filters)

Exposure: Exposure:  16 x 12 min (1x1 bin) exposure with IR/UV Block filter, 8 x 4 min (2x2 bin) RGB exposures.

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Calibrated, stacked (Kappa Sigma Combine) - Deep Sky Stacker. LRGB channel registration, equalization, gradient removal - Astroart.  Curves, Levels, RGB combine - ImagesPlus. Luminance Layering, final stretch, and finishing  - Photoshop.  RGB calibration - eXcalibrator. This image is a  RGB combine with Luminance layering.  Color saturation in LAB color.  The IR/UV Blocking filter exposure stack was used for the luminance layer. High pass sharpening applied. mages processed at 3352 x 2532 resolution. Final Image size is approximately  2800 x 2100.

North is up in this image.   NGC 3184 is the large spiral in the upper left. It is known for an abundance of heavy metals and  several recent supernova. Embedded in this galaxy are two other NGC objects NGC 3180 (two parts NE / SW) and NGC 3181. These two embedded NGC's are HI regions - some with star clusters. The other NGC object in this field is NGC  3179 - an SO class galaxy toward the lower left. In the lower right are some distant galaxy clusters (basically seen in this image as a swarm of numerous points of light). This part of the image partially covers the area of the Abel 958 galaxy cluster, but little information is available on this cluster. However, there are three cataloged galaxy clusters within a small radius of the northern portion of the Abel 958 span - all of these have relatively large redshift vales. These galaxies and galaxy cluster are identified in the annotated image.. This image replaces an earlier image that can be seen in the Archives hereHorizontal FOV is approximately 38 arc minutes.

Image center is located approximately - Equatorial 2000: RA: RA: 10h 17m 16s Dec: +4116'45" 

 

All images and content remain the property of Jim Thommes - copyright 2003 - 2018

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