Hemisphere:  Northern  ·  Constellation: Andromeda (And)  ·  Contains:  IC 1559  ·  NGC 160  ·  NGC 162  ·  NGC 169  ·  PGC 1696599  ·  PGC 212552  ·  PGC 2148
Getting plate-solving status, please wait...
Arp 282, 



    
        

            Gary Imm
Arp 282, 



    
        

            Gary Imm

Arp 282

Getting plate-solving status, please wait...
Arp 282, 



    
        

            Gary Imm
Arp 282, 



    
        

            Gary Imm

Arp 282

Imaging Telescopes Or Lenses
Celestron EdgeHD 11"
Imaging Cameras
ZWO ASI1600MM Pro
Mounts
Astro-Physics Mach1 GTO
Filters
Astrodon Gen2 I-Series Tru-Balance Blue · Astrodon Gen2 I-Series Tru-Balance Green · Astrodon Gen2 I-Series Tru-Balance Lum · Astrodon Gen2 I-Series Tru-Balance Red
Accessories
Celestron Off-Axis Guider · Moonlite Revised CHL 2.5 inch Large Format Crayford EDGE Focuser · ZWO EFW 7 x 2″
Software
Main Sequence Software Sequence Generator Pro (SGP) · Open PHD Guiding project PHD2 · Pleiades Astrophoto PixInsight
Guiding Cameras
ZWO ASI174MM Mini

Acquisition details

Dates:
Oct. 15, 2020 ·  Oct. 16, 2020
Frames:
Astrodon Gen2 I-Series Tru-Balance Blue: 30x120" (1h) (gain: 139.00) -20°C bin 1x1
Astrodon Gen2 I-Series Tru-Balance Green: 30x120" (1h) (gain: 139.00) -20°C bin 1x1
Astrodon Gen2 I-Series Tru-Balance Lum: 60x120" (2h) (gain: 139.00) -20°C bin 1x1
Astrodon Gen2 I-Series Tru-Balance Red: 30x120" (1h) (gain: 139.00) -20°C bin 1x1
Integration:
5h
Avg. Moon age:
28.57 days
Avg. Moon phase:
1.42%

RA center: 00h36m22s.674

DEC center: +23°5922.13

Pixel scale: 0.281 arcsec/pixel

Orientation: 179.248 degrees

Field radius: 0.190 degrees

More info:Open 

Resolution: 3908x2900

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

Data source: Backyard

Description

This Arp object, located on the right edge of this image, is a pair of interacting galaxies located 320 million light years away in the constellation of Andromeda at a declination of +24 degrees.

The framing of this image is a bit unusual. A bright 6th magnitude star is located just below and to the right of this object, so I moved that distracting bright star just off of the image. Also, south is up for this image. I usually orient my images so that north is up, but I make an exception (as in this case) to put the near side of an edge-on spiral galaxy towards the bottom of the image. That orientation is simply easier for my simple mind to interpret.

The main galaxy here is NGC 169, a near edge-on Seyfert galaxy. This galaxy is huge – the main bright portion of the galaxy is 140,000 light years in diameter. The outer edges of the galaxy, seen in the extended star streams, span twice that distance. The companion is IC 1559, a polar ring galaxy 40,000 light years in diameter.

Many times I find Dr. Arp’s classification and notes somewhat puzzling, but it this case they are spot on. He classified this object into the category of Double Galaxies – Infall and Attraction. His notes say, “Companion appears to rain into nucleus of spiral.” That is a great way to describe this object. It looks to me like the companion is being sucked into and swallowed up by the vortex of the main galaxy below. As a result of the interaction, the core of the main galaxy is shifted left, its bulge of halo stars is brighter above the core, its dust lane has been distorted, and numerous star streams are seen to the right of the main disk. I love the contrasting colors of the 2 galaxies of this object.

I am shocked at how similar this object is to NGC 1532. I have included a comparison image in Revision C. Arp 282 is 5x further away from us than NGC 1532, so the detail is not as good with it.

The other interesting object in this image is NGC 160, to the left. This galaxy is closer at 270 million light years and is large, at a diameter of 150,000 light years. I like seeing the hint of a faint hexagonal shape to the inner ring, which is due to the Vorontsov-Velyaminov rows in the arms.

Thanks for sticking with me through this long-winded description. I found the objects here to be fascinating. Just when I start getting a bit run down by the imaging/processing grind, I run across a view like this which reinforces my love for this hobby.

Comments

Revisions

  • Final
    Arp 282, 



    
        

            Gary Imm
    Original
  • Arp 282, 



    
        

            Gary Imm
    B
  • Arp 282, 



    
        

            Gary Imm
    C

B

Description: Comparison to Original Arp Image

Uploaded: ...

C

Description: Comparison of Arp 282 to NGC 1532

Uploaded: ...

Sky plot

Sky plot

Histogram

Arp 282, 



    
        

            Gary Imm