Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  IC 455  ·  NGC 2276  ·  NGC 2300
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Arp 25 (with Arp 114), 



    
        

            Gary Imm
Arp 25 (with Arp 114), 



    
        

            Gary Imm

Arp 25 (with Arp 114)

Getting plate-solving status, please wait...
Arp 25 (with Arp 114), 



    
        

            Gary Imm
Arp 25 (with Arp 114), 



    
        

            Gary Imm

Arp 25 (with Arp 114)

Imaging Telescopes Or Lenses
Takahashi TOA-130NFB
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 · Feathertouch Focuser Boss II Electronic Focusing Control · Takahashi Flattener TOA-67
Software
Main Sequence Software Sequence Generator Pro · PixInsight · Stark Labs PHD2 2.6.3
Guiding Telescopes Or Lenses
Orion 60mm Guidescope
Guiding Cameras
Orion StarShoot AutoGuider Pro Mono

Acquisition details

Dates:
Feb. 20, 2019 ·  Feb. 21, 2019
Frames:
Astrodon Blue 31mm Gen2 I-Series: 80x30" (40') (gain: 139.00) -20°C bin 1x1
Astrodon Green 31mm Gen2 I-Series: 80x30" (40') (gain: 139.00) -20°C bin 1x1
Astrodon Lum 31mm Gen2 I-Series: 240x30" (2h) (gain: 139.00) -20°C bin 1x1
Astrodon Red 31mm Gen2 I-Series: 80x30" (40') (gain: 139.00) -20°C bin 1x1
Integration:
4h
Avg. Moon age:
16.33 days
Avg. Moon phase:
96.90%

RA center: 07h27m26s.490

DEC center: +85°4538.63

Pixel scale: 0.782 arcsec/pixel

Orientation: -171.670 degrees

Field radius: 0.332 degrees

More info:Open 

Resolution: 2363x1939

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

Data source: Backyard

Description

This image captures two small Arp objects located 120 million light years away in the northern constellation of Cepheus. This is one of the few areas of the sky where one can capture two Arp objects in the same narrow field of view. At a declination of almost 86 degrees, these two objects are the closest major deep sky objects to Polaris.

The large face-on spiral galaxy at the center is NGC 2276. This galaxy is also Arp 25, categorized as a "spiral galaxy with one heavy arm". The large elliptical galaxy 6 minutes to the right is NGC 2300. Arp 114 consists of both of these galaxies, categorized as an "elliptical galaxy close to and perturbing a spiral galaxy". Both galaxies have diameters of about 100,000 years. The bright 8th magnitude star near the image center is HD 51141.

I love the structure of NGC 2276 - the core which is displaced well left and above the center, the large single arm at the top, 3+ parallel arms at the bottom, and the intense star formation which appears to be leading to numerous active regions (super star clusters?) throughout the galaxy but especially to the left. The major arms all appear to be Vorontsov-Velyaminov rows (straight segments with similar angles between segments). The formation of these fascinating V-V rows is not well understood.

Many other interesting galaxies of various types are seen in the background.

Comments

Revisions

  • Final
    Arp 25 (with Arp 114), 



    
        

            Gary Imm
    Original
  • Arp 25 (with Arp 114), 



    
        

            Gary Imm
    B

B

Description: Comparison to Original Arp 25 Image

Uploaded: ...

Sky plot

Sky plot

Histogram

Arp 25 (with Arp 114), 



    
        

            Gary Imm