Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  NGC 3945  ·  PGC2606250
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NGC 3945, 



    
        

            Gary Imm
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NGC 3945

Getting plate-solving status, please wait...
NGC 3945, 



    
        

            Gary Imm
Powered byPixInsight

NGC 3945

Imaging telescopes or lenses: Celestron EdgeHD 11

Imaging cameras: ZWO ASI 1600MM Cooled Pro

Mounts: Astro-Physics Mach1GTO

Guiding cameras: ZWO ASI174MM

Software: Main Sequence Software Sequence Generator Pro  ·  PixInsight  ·  Stark Labs PHD2 2.6.3

Filters: Astrodon Green 31mm Gen2 I-Series  ·  Astrodon Blue 31mm Gen2 I-Series  ·  Astrodon Lum 31mm Gen2 I-Series  ·  Astrodon Red 31mm Gen2 I-Series

Accessory: ZWO EFW  ·  Celestron OAG  ·  MoonLite Focuser for EdgeHD 11


Dates:May 10, 2020May 11, 2020

Frames:
Astrodon Blue 31mm Gen2 I-Series: 30x120" (1h) (gain: 139.00) -20C bin 1x1
Astrodon Green 31mm Gen2 I-Series: 30x120" (1h) (gain: 139.00) -20C bin 1x1
Astrodon Lum 31mm Gen2 I-Series: 60x120" (2h) (gain: 139.00) -20C bin 1x1
Astrodon Red 31mm Gen2 I-Series: 30x120" (1h) (gain: 139.00) -20C bin 1x1

Integration: 5h

Avg. Moon age: 18.65 days

Avg. Moon phase: 83.64%


RA center: 11h53m13s.491

DEC center: +60°4031.42

Pixel scale: 0.281 arcsec/pixel

Orientation: -1.149 degrees

Field radius: 0.210 degrees

More info:Open 


Resolution: 4410x3058

Locations: Backyard (Mag 20.8 - Bortle 4.5), Onalaska, Texas, United States

Data source: Backyard

Description

This object is a double ring galaxy located 75 million light years away in the constellation of Ursa Major at a declination of +61 degrees. This galaxy spans 5.5 arc-minutes in our apparent view, which corresponds to an actual diameter of 120,000 light years. The galaxy appears to us 30 degrees from edge-on in our apparent view.

I love the double ring structure. The inner ring has ansae at each end of a faint bar. The right ansae has a faint but interesting structure as well as a slight vertical dust lane.

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