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Technical card

Resolution: 3266x2381

Dates: March 2, 2017

Frames: 72x300"

Integration: 6.0 hours

Avg. Moon age: 3.61 days

Avg. Moon phase: 14.02% job: 1481134

RA center: 187.066 degrees

DEC center: 13.122 degrees

Pixel scale: 2.737 arcsec/pixel

Orientation: -175.254 degrees

Field radius: 1.536 degrees


Markarian's Chain is a collection of galaxies in the constellation Virgo that appears to form a curved line. The members include M84, M86, NGC 4477, NGC 4473, NGC 4461, NGC 4458, NGC 4438 and NGC 4435.

Also in this field is M87, a very large elliptical galaxy at the lower left and is some 53 million light years away. It is one of the largest galaxy near the Milky Way and houses a supermassive black hole. From infalling material, this black hole powers a long jet that extends 5 thousand light years and is visible at the 2 o'clock position in the magnified view of version B. The jet is one of the brightest radio sources and was one of the first radio objects discovered. I was surprised to find the jet visible in a modest focal length scope. The TMB92SS with reducer gives about a 400mm focal length.

Among these galaxies are numerous distant galaxies highlighted in the annotated version A.




Sky plot

Sky plot


Markarian's Chain and M87's jet, AstroGabe

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