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NGC 4535 and NGC 4519 in Virgo



Scope: C8 Schmidt Cassigrain at f/6.9,  Laguna Mountains, CA,  21 April 2012, Camera: ST8300M

Exposure: 16 x 8 minutes UV/IR Block  (2x2 bin),  and 8 x 4 minutes (3x3 bin) RGB Exposures 

Processing: Images were captured with CCDSoft. Aligned/stacked and dark subtracted in Astroart; Sigma Combine method was used for stacking subs.  All channels were scaled and rough color balanced in Astroart.   Channels were co-registered in Astroart.   Central gradient was removed in Astroart. The UV/IR Block exposures  were used for the main luminance construction.  Level adjustments and curves were used to bring out object features.   LRGB combine was done in Photoshop. Color saturation performed by Luminance Layering and LAB Color Space Curves. The background was gain reduced on the Luminance channel.  Selective sharpening was applied to galaxy features. Final touches and color balance in Photoshop. Final Image size is approximately  1676x1266 (cropped and resized to 2000x1500).

 North is to the left in this image. In this field are two noticeable galaxies; the large prominent galaxy is NGC4535; the smaller galaxy in the upper left is NGC 4519. There are several smaller background galaxies that are recognizable - it is best to see the full size image to see these background galaxies. Both NGC 4535 and NGC 4519 are members of the Virgo Super Cluster of galaxies. NGC 4535 is approximately 52 million light years distant from Earth.   Horizontal FOV is about 44'.

Image center is located approximately - Equatorial 2000: RA: RA: 12h 33m 25s Dec: +0841'28" 


All images and content remain the property of Jim Thommes - copyright 2003 - 2012

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