NGC 660

Show astrometry data

NGC 660 is a peculiar polar ring galaxy somewhere between 26 and 48 million light years from Earth and about 1/3 the size of our own Milky Way Galaxy. As a result of two galaxies merging, the dust lanes have created an "X" pattern. 

The very small apparent size of this galaxy (just 2.7 x 0.84 arcminutes), along with its very low surface brightness (magnitude 12) makes this a difficult target even for our 600mm RiLA telescope. This is the first image from the RiLA after 2 years of optical and mechanical issues have finally been sorted out.

Many other galaxies can be seen in this image. The light was collected over 4 nights by Mike Selby from Samphran, Thailand. Image processing was a challenge due to great variations in the background from local light pollution. A noise floor technique was used to help reduce background mottling.

This image was selected by Photographing Space as Image of the Week, March 12, 2018.

Object details

Galaxy in Pisces

Right Ascension: 01h 43m 02.4s

Declination: +13° 38′ 42″

Magnitude: 12.0

Moon Age Average: 2.43 days

Moon Phase Average: 9.13 %

Imaging Setup


SC Observatory, Central Thailand

Dec 19, 2017, Dec 20, 2017, Dec 21, 2017 and Dec 24, 2017
Officina Stellare RiLA 600
Focal Length:
3000 mm
Paramount Taurus 600
FLI PL 16803
Image Scale:
0.62 arcseconds/pixel
Imaging Software:

TheSkyX Professional

Processing Software:

Adobe Photoshop

PixInsight 1.8

Exposure Detail

Filter Filter Brand Bin Qty Exposure
L Astrodon 1x 69 480
R Astrodon 2x 36 180
G Astrodon 2x 37 180
B Astrodon 2x 40 180

Total Exposure Time

14 hours, 51 minutes

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