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Technical card

Resolution: 4008x2672

Dates: Jan. 1, 2012Jan. 2, 2012

AstroDon Tru-Balance E-Series Blue: 6x300" -20C bin 2x2
AstroDon Tru-Balance E-Series Green: 6x300" -20C bin 2x2
AstroDon Tru-Balance E-Series Luminance: 5x600" -20C bin 1x1
AstroDon Tru-Balance E-Series Red: 5x300" -20C bin 2x2

Integration: 2.2 hours

Avg. Moon age: 7.58 days

Avg. Moon phase: 52.13%

Bortle Dark-Sky Scale: 2.00 job: 164296

RA center: 186.766 degrees

DEC center: 12.942 degrees

Pixel scale: 3.496 arcsec/pixel

Orientation: -88.341 degrees

Field radius: 2.338 degrees

Locations: iTelescope.Net - New Mexico, Mayhill, NM, United States


Markarian's Chain is a string of related galaxies in the Virgo Cluster, about 55 million light years distant. Messier 87 is the largest, and is upper-left-center. The arc of the "Chain" is clearly visible, as are many other distant elliptical galaxies. Zoom in to the full size image and many "stars" become fuzzy dots of galaxies as well.

This is a rough processing as I have one more run of data to add (some Luminance, some color), and as such I haven't cleaned up the satellite trails or bad columns yet.

Update 2013-05-25: I never did get around to cleaning this up. I have since learned how to kill those hot columns nicely, among other things. I will eventually re-post this under a new date.




Sky plot

Sky plot


Markarian's Chain - Rough Cut, ADBjester