NGC7320 Stephan’s Quintet

Stephan's Quintet is a visual grouping of five galaxies of which four form the first compact galaxy group ever discovered. The group is visible in the constellation Pegasus.

 

Four of these galaxies are about about 300 million light years away. Because of the two dimensional nature of this image, the fifth member (to the left of the middle pair) appears to be with the others; but in fact it is “only” 40 million light years away, so it is not part of the more distant group.

 

You may recognise these galaxies from the opening scenes of the classic 1946 film, “It’s a Wonderful Life.”

 

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Telescope: Celestron C11-A XLT Schmidt Cassegrain OTA

Mount: SkyWatcher EQ6-R Pro

 

Controller: ZWO ASIAIR Plus 256G

Main Camera: ZWO ASI533MC Pro at -10C

Filter: Optolong L-Pro filter

Focuser: ZWO EAF

Guide Camera: ZWO ASI174MM Mini guidecam

Guide via: ZWO OAG

 

Stacked from:

Lights 65 at 120 seconds, gain 101, temp -10C

Darks 30 at 120 seconds, gain 101, temp -10C

Flat 30 at 160ms, gain 101, temp -10C

Dark Flat 30 at 160 ms gain 101 temp -10C

 

Bortle 4 sky.

Integrated the saved frames in Astro Pixel Processor.

Processed in PixInsight

Added captions in Photoshop CS4

 

Done