Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  NGC 3945  ·  PGC 2606250
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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
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
Accessories
ZWO EFW · Celestron OAG · MoonLite Focuser for EdgeHD 11
Software
Main Sequence Software Sequence Generator Pro · PixInsight · Stark Labs PHD2 2.6.3
Guiding Cameras
ZWO ASI174MM

Acquisition details

Dates:
May 10, 2020 ·  May 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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