Hemisphere:  Northern  ·  Constellation: Draco (Dra)  ·  Contains:  NGC 6636  ·  NGC6636  ·  PGC2688569  ·  PGC2688704  ·  PGC61780  ·  PGC61782
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NGC 6636, 



    
        

            Gary Imm
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NGC 6636

Getting plate-solving status, please wait...
NGC 6636, 



    
        

            Gary Imm
Powered byPixInsight

NGC 6636

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:April 24, 2020April 25, 2020

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

Integration: 5.0 hours

Avg. Moon age: 1.72 days

Avg. Moon phase: 3.54%


Astrometry.net job: 3552441

RA center: 18h 22' 2"

DEC center: +66° 36' 58"

Pixel scale: 0.281 arcsec/pixel

Orientation: -0.309 degrees

Field radius: 0.172 degrees


Resolution: 3626x2495

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

Data source: Backyard

Description

This object is a pair of interacting galaxies located 200 million light years away in the constellation of Draco at a declination of +67 degrees. The pair span 2 arc-minutes in our apparent view, which corresponds to an actual diameter of 120,000 light years.

Incredibly, little has been written about this interesting object. The large edge-on galaxy core is yellow and its arms have a bluish cast. Many star clusters are visible in the galaxy disk – in fact, I am surprised at the amount of detail seen for an object 200 million light years away. The galaxy disk is deformed, more at the bottom than at the top, likely due to the gravitational interaction with its companion.

The structure of the small companion is a mystery to me. The inner region is so compact and bright that it looks like a star, while the outer region is diffuse. I am surprised that this small companion is not more deformed from the interaction.

There is a tiny smudge visible above the small companion. This tiny object could be a remnant of this interaction, but my guess is that it is a distant background galaxy.

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