Hemisphere:  Northern  ·  Constellation: Andromeda (And)  ·  Contains:  NGC 67  ·  NGC 68  ·  NGC 69  ·  NGC 70  ·  NGC 71  ·  NGC 72
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NGC 70 Galaxy Group - Arp 113., 


NGC 70 Galaxy Group - Arp 113.
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NGC 70 Galaxy Group - Arp 113.


Imaging Telescopes Or Lenses
Orion Optics UK DX 250
Imaging Cameras
Starlight Xpress H9C
Vixen GPDX w/ SS2K
PixInsight · PHD · Astroart 3 · NEAT
Guiding Cameras
KWIQ Guider

Acquisition details

Nov. 14, 2010
50x120" (1h 40')
1h 40'
Avg. Moon age:
8.10 days
Avg. Moon phase:

Basic astrometry details

Astrometry.net job: 203061

RA center: 00h18m19s.2

DEC center: +30°0614

Pixel scale: 2.338 arcsec/pixel

Orientation: -175.429 degrees

Field radius: 0.258 degrees

Resolution: 640x471

Locations: Home, Weymouth, Dorset, UK, United Kingdom

Data source: Backyard


This is an image I took back in November, when Andromeda was favourably placed for observation, but have only just got around to processing.

It shows Arp 113, a small but interesting group of galaxies based around ngc 70, the rather ill-defined spiral galaxy at the top of the group.

Close examination shows the image to be covered with multiple faint galaxies. I've identified the main cluster members but will leave those with sufficient interest to identify the remainder!

NGC 70 is magnitude 14.5 and the group is estimated to be around 250 - 300 MLy distant. There are no quasars that I have been able to identify in the field or some distance from the group for that matter.

I have been unable to find much research on this group, so there is not too much more to add. I think this is one to just enjoy for what it represents - a beautiful island of interacting galaxies floating on a sea of incredibly distant background galaxies. I should perhaps add that Halton Arp placed Arp 113 in the class "Elliptical or Elliptical-like Galaxies close to perturbing spirals".

Imaged through my 10" reflector, 50 x 120 second exposures, guided using PHD and my little KWIQ guider. Acquired and Sigma combined in AA3, processed in PixInsightLE32.


Sky plot

Sky plot


NGC 70 Galaxy Group - Arp 113.,