Celestial hemisphere:  Northern  ·  Constellation: Pisces (Psc)  ·  Contains:  NGC 660
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Polar-Ring Galaxy NGC660, 


Polar-Ring Galaxy NGC660
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Polar-Ring Galaxy NGC660

Getting plate-solving status, please wait...
Polar-Ring Galaxy NGC660, 


Polar-Ring Galaxy NGC660
Powered byPixInsight

Polar-Ring Galaxy NGC660

Acquisition details

Oct. 8, 2020 ·  Nov. 10, 2020 ·  Nov. 23, 2020
Astrodon I-series: 60×480(8h) bin 2×2
Ha 5nm: 20×480(2h 40′) bin 2×2
Luminance: 90×600(15h) bin 1×1
25h 40′
Avg. Moon age:
17.82 days
Avg. Moon phase:

Basic astrometry details

Astrometry.net job: 4060310

RA center: 01h43m03s.8

DEC center: +13°3849

Pixel scale: 0.511 arcsec/pixel

Orientation: 58.949 degrees

Field radius: 0.187 degrees

Resolution: 2184x1464

File size: 935.8 KB

Data source: Backyard


Polar-Ring Galaxy NGC660

The Arecibo radio dish is sadly being decommissioned following the failure of two support cables in August and November 2020. At a diameter of 305 meters, the spherical dish was the largest single aperture telescope in the world for 53 years until the construction in 2016 of the Five-hundred-meter Aperture Spherical Telescope (FAST) in China. During its illustrious 57-year history, the Arecibo Observatory has been at the forefront of numerous scientific endeavors and discoveries.

In January 2013, researchers using the Arecibo telescope in a multi-year study of molecules in nearby galaxies reported an unexpected and dramatic outburst of energy in the polar-ring galaxy NGC660. The magnitude of this outburst was reported as about ten times brighter than a supernova explosion and possibly resulting from a tremendous jet emanating from the galaxy's central black hole. A subsequent study using a combination of archival radio and Chandra X-ray data, together with new radio observations made using e-MERLIN in mid-2013 showed a new compact and extremely bright continuum source at the center of the galaxy. The authors concluded “that we are seeing a period of new active galactic nuclei (AGN) activity in the core of this polar ring galaxy.”

NGC660 has an apparent size of 2.7 x 0.8 arc-minutes and magnitude of 12.0.

The description from Wikipedia states: “NGC 660 is a peculiar and unique polar-ring galaxy located approximately 45 million light years from Earth in the Pisces constellation.[3] It is the only such galaxy having, as its host, a "late-type lenticular galaxy".[4] It was probably formed when two galaxies collided a billion years ago.[5] However, it may have first started as a disk galaxy that captured matter from a passing galaxy. This material could have, over time, become "strung out" to form a rotating ring.

The ring is not actually polar, but rather has an inclination from the plane of the host disk of approximately 45 degrees.[4] The extreme number of pinkish star-forming areas that occurs along the galaxy's ring could be the result of the gravitation interaction caused by this collision. The ring is 50,000 light-years across - much broader than the disk itself - and has a greater amount of gas and star formation than the host ring. This likely indicates a very violent formation.”

I hope you enjoy the image!

Online references used for this narrative:










Sky plot

Sky plot


Polar-Ring Galaxy NGC660,