Hemisphere:  Southern  ·  Constellation: Aquarius (Aqr)  ·  Contains:  NGC 7724  ·  NGC 7727
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Arp 222 - NGC 7727, 



    
        

            Gary Imm
Arp 222 - NGC 7727, 



    
        

            Gary Imm

Arp 222 - NGC 7727

Getting plate-solving status, please wait...
Arp 222 - NGC 7727, 



    
        

            Gary Imm
Arp 222 - NGC 7727, 



    
        

            Gary Imm

Arp 222 - NGC 7727

Imaging telescopes or lenses: Takahashi TOA-130NFB

Imaging cameras: ZWO ASI 183MM Pro Cool

Mounts: Astro-Physics Mach1GTO

Guiding telescopes or lenses: Orion 60mm Guidescope

Guiding cameras: Orion StarShoot AutoGuider Pro Mono

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  ·  Takahashi Flattener TOA-67  ·  Feathertouch Focuser Boss II Electronic Focusing Control


Dates:June 2, 2019June 3, 2019June 4, 2019

Frames:
Astrodon Blue 31mm Gen2 I-Series: 30x120" (1h) (gain: 111.00) -12C bin 1x1
Astrodon Green 31mm Gen2 I-Series: 30x120" (1h) (gain: 11.00) -12C bin 1x1
Astrodon Lum 31mm Gen2 I-Series: 60x120" (2h) (gain: 111.00) -12C bin 1x1
Astrodon Red 31mm Gen2 I-Series: 30x120" (1h) (gain: 111.00) -12C bin 1x1

Integration: 5h

Avg. Moon age: 9.93 days

Avg. Moon phase: 0.84%


Astrometry.net job: 2907538

RA center: 23h 39' 53"

DEC center: -12° 17' 33"

Pixel scale: 0.494 arcsec/pixel

Orientation: -179.202 degrees

Field radius: 0.322 degrees


Resolution: 3762x2814

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

Data source: Backyard

Description

This object is a rarely imaged, severely distorted, face-on spiral galaxy located 70 million light years away in the constellation of Aquarius, at a declination of -12 degrees. Its diameter of 4 arc-minutes corresponds to a width of 90,000 light years.

This galaxy has numerous arcing star streams which wrap around the core. The "core" is actually two bright cores side by side, with a separation of only 3 arc-seconds. These two bright cores are visible upon close examination of the full resolution image. Because of these two cores and the star streams, it appears that this galaxy has been the product of a galaxy merger.

Although the central galaxy region is a bit pinkish in hue, most of the galaxy is white. This, plus the lack of star clusters and HII regions, indicates that little star formation is occurring. Long term, this galaxy will likely evolve into a large elliptical.

NGC 7724 is seen at the lower left. Although this galaxy is not believed to be interacting with NGC 7727, it has an interesting structure all its own. The core is oval shaped and is likely a weak bar. Out of each end of the bar extends a single arm, each of which wrap around 180 degrees. For some reason one of these arms, after wrapping 180 degrees, appears to reconnect to the opposite end of the bar.

This is one of my favorite recent images. I really love the intricate structure of both objects. I don't understand why this pair of objects is not more commonly imaged.

Comments

Revisions

  • Final
    Arp 222 - NGC 7727, 



    
        

            Gary Imm
    Original
  • Arp 222 - NGC 7727, 



    
        

            Gary Imm
    B

B

Description: Comparison to Original Arp Image

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Arp 222 - NGC 7727, 



    
        

            Gary Imm