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Contains:  M 87, NGC 4486, NGC 4478, NGC 4476, NGC 4473, NGC 4461, NGC 4458, NGC 4440, NGC 4438, NGC 4436, The Eyes, NGC 4435, NGC 4431, NGC 4425, NGC 4413, M 86, NGC 4406, NGC 4402, NGC 4388, NGC 4387, M 84, NGC 4374
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Markarian's Chain, 


            Brian Poole
Markarian's Chain

Markarian's Chain

Technical card

Resolution: 4002x3039

Dates:March 18, 2018

Optolong Blue 1.25": 4x600" -15C bin 1x1
Optolong Green 1.25": 4x600" -15C bin 1x1
Optolong Lum 1.25": 4x600" -15C bin 1x1
Optolong Red 1.25": 4x600" -15C bin 1x1

Integration: 2.7 hours

Darks: ~10

Flats: ~50

Bias: ~50

Avg. Moon age: 0.95 days

Avg. Moon phase: 1.01%

Bortle Dark-Sky Scale: 2.00

Mean SQM: 21.95

Temperature: 12.10 job: 1975697

RA center: 187.086 degrees

DEC center: 12.914 degrees

Pixel scale: 1.611 arcsec/pixel

Orientation: 330.909 degrees

Field radius: 1.124 degrees

Data source: Traveller


Had an opportunity to participate in a star party at an area with Bortle 2 skies and went for this "new to me" target. I ran into some complications with trying to do new things with SGP so I had to throw away half a night's worth of frames not to mention the 20mph gusts we were facing, but in the end I'm fairly happy with how it turned out. Tracking and guiding was better than I had hoped for to be honest.



Brian Poole
License: None (All rights reserved)

Sky plot

Sky plot


Markarian's Chain, 


            Brian Poole

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