Astrophotography by Roberto Marinoni

NGC 7217

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About image 

NGC 7217 is a spiral galaxy in Pegasus constellation, about 52 million light years away.
It is characterized by the presence of several concentric rings of stars around its core: it is believed that the cause could be the merger of a small compact galaxy with a larger spiral galaxy.

Technical data
Optic         GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount       10Micron GM2000 HPSII
Camera        ZWO ASI 2600 MM Pro with filter wheel 7 positions
Filters        Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted LRGB  
Guiding system   ZWO OAG-L with guide camera ASI 174MM
Exposure details  L 43x300" bin3 -15C

             R 15x300" bin3 -15C
             G 15x300" bin3 -15C
          B 15x300" bin3 -15C

                all gain 100
Total integration  7h20'
Acquisition      Voyager, PHD2
Processing      Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
SQM-L       21.20   
Location       Promiod (Aosta Valley, Italy), own remote observatory
Date           17/18 September 2025

 

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