NGC 7331 and Stephan’s Quintet from my „Jade“ observatory

These objects I imaged several times during the years. The last one is an image with my new equipment on the second pier „Deep Sky Pier“ in my „Jade Observatory“.

NGC 7331 is an unbarred spiral galaxy and Stephan’s Quintet is a visual grouping of five galaxies, both situated in the constellation Pegasus.

Data calibration, registration and the final processing was done with PixInsight. The result was as follows:

There are so many quasars in this image that I can only show the most distant of them, which is:

SDSS J223252.17+343712.8 with a redshift of 3.65 and an apparent mag_v of 19.22 (PanStarrs).

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Here is an overview of the used equipment and the exposure times:

• Date: September 2025
• Location: Varel
• Telescope/Lense: 6″ Lacerta Newton
• Focal length [mm]: 450
• Focal ratio: 3
• Mount: Skywatcher EQ 8
• Camera: Lacerta Deepsky 2600 M
• Autoguiding: Off-Axis with ZWO Asi 120 MM Mini
• Filter: L:R:G:B
• Exposure time [min]: 495:240:240:240
• Resolution: 0.88″/px (Drizzle 2)

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This is my image from 2013. Data calibration, registration and the final processing was done with PixInsight. The result was as follows:

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Here is an overview of the used equipment and the exposure times:

• Date: 2013
• Location: Krefeld
• Telescope/Lense: 8″ GSO Newton
• Focal length [mm]: 800
• Focal ratio: 3.9
• Mount: Losmandy G11
• Camera: Moravian 8300FW
• Filter: L:R:G:B
• Exposure time [min]: 168:60:60:45
• Resolution: 1.21″/px

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This is my image from 2010. Data calibration and registration was done with DeepSkyStacker, the final processing was done with PixInsight. The result was as follows:

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Here is an overview of the used equipment and the exposure times:

• Date: 2010
• Location: Krefeld
• Telescope/Lense: 10″ Orion Newton
• Focal length [mm]: 1200
• Focal ratio: 4.8
• Mount: Skywatcher NEQ 6
• Camera: Canon 500 Da
• Filter: OSC
• Exposure time [min]: 160
• Resolution: 2.1″/px

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