Contains: NGC 5218, NGC 5216, NGC 5205
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NGC 5218 Keenans System

Technical card

Resolution: 3273x2457

Dates: May 27, 2017

Frames: 35x600"

Integration: 5.8 hours

Avg. Moon age: 1.96 days

Avg. Moon phase: 4.29%

Astrometry.net job: 1593078

RA center: 202.826 degrees

DEC center: 62.658 degrees

Pixel scale: 0.615 arcsec/pixel

Orientation: 91.625 degrees

Field radius: 0.349 degrees

Locations: Beilen Observatory B85, Beilen NL, Beilen, Drenthe, Netherlands

Description

17 x 600s L and 6 x 600s each RGB on several nights in may 2017. There is probably a problem with the red images, I think the colour filter focus calibration is off. Still it is an intriguing object. The nights here are not completely dark this time of year, we only get a few hours of astronomical twilight , and around the longest day that shrinks to half an hour...

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Author

Albert van Duin
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NGC 5218 Keenans System, 




    

        Albert van Duin