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Grus Quartet of Galaxies: These four spiral galaxies in the southern constellation of Grus are in a distance of about 50 million LY. They are interacting galaxies, which means that they are gravitationally bound to each other and exchanging matter.
From left to right their designations are NGC 7599, 7590, 7582 and 7552.

Several other galaxies can be detected in the image( see the High Res version) but they are much further away and not related to this quartet of galaxies.


The image was taken at the observatory of IAS at Hakos Farm in Namibia.

Object Grus Quartet of Galaxies
Category IAS Hakos, Namibia
Designation NGC 7552,7582,7590,7599
Constellation Grus
Optics Keller 20 inch Cassegrain f/3 in corrected primary focus
Mount Liebscher GEM
Camera SBIG STL-11000M with internal CFW 5
Exposure 4 x 5min each Baader LRGB filterset. Maxim DL for image acquisition
Calibration Dark + Flat Frame
Guiding StarlightXpress Lodestar on Schneider OAG, Maxim DL as Guiding Software
Processing Maxim DL5, Photoshop. Color Code LRGB
Location-Date IAS-Hakos, Namibia - 21 Nov 2011
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