Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Getting plate-solving status, please wait...
The Tadpole Galaxy - ARP 188, 


            Kevin Morefield
The Tadpole Galaxy - ARP 188

The Tadpole Galaxy - ARP 188

Technical card

Imaging telescope or lens:Planewave CDK14

Imaging camera:SBIG STX 16803

Mount:Paramount ME II

Guiding telescope or lens:Planewave CDK14

Software:CCDWare CCDStack 2Adobe Photoship CCCCDWare CCDAutoPilot 5PixInsight

Resolution: 2689x2410

Dates:May 6, 2019

Astrodon Blue: 20x600" -30C bin 1x1
Astrodon Green: 26x600" -30C bin 1x1
Astrodon Luminance: 23x600" -30C bin 1x1
Astrodon Red: 27x600" -30C bin 1x1

Integration: 16.0 hours

Darks: ~20

Flats: ~20

Bias: ~20

Avg. Moon age: 1.55 days

Avg. Moon phase: 2.68%

Bortle Dark-Sky Scale: 3.00 job: 2702998

RA center: 241.540 degrees

DEC center: 55.443 degrees

Pixel scale: 0.728 arcsec/pixel

Orientation: 234.146 degrees

Field radius: 0.365 degrees

Locations: Sierra Remote Observatory, Auberry, California, United States

Data source: Own remote observatory

Remote source: Sierra Remote Observatories


This galaxy makes up for its small size by displaying a beautiful tidal interaction with a passing galaxy. Interestingly, that second galaxy can be seen through the main spiral about 300,000 light years behind our view. The tail it produced is a similar size at 280,000 light years. Go to the full resolution view and you can see the interloper as a vertical blob through the spirals.

At only 3.2 arc-minutes in size this is a challenge. If I was starting over I'd probably use less of a stretch to control noise better. The tail is actually pretty bright compared to the say the tail on the Hamburger galaxy.

This is 16 hours total integration time. I used a super luminance, combining the luminance data from the color subs with the luminance to get the most I could out of the data.



Kevin Morefield
License: None (All rights reserved)

Sky plot

Sky plot


The Tadpole Galaxy - ARP 188, 


            Kevin Morefield