The Grus Quartet (NGC 7552, 7582, 7590, 7599)

© Velimir Popov & Emil Ivanov 2016
Size: 2000 px

The Grus-Quartet consists of four large spiral galaxies which are relatively close to each other. In that they should be interacting. The high starburst activity of two of the members, NGC 7552 and NGC 7582, is also thought to be a result from the tidal interactions. The distance to the galaxies is estimated to be between 55 and 70 Mly. Closer inspection of this image reveals that there are many deep yellow objects with fuzzy outlines. In fact these are distant galaxies hundreds of millions of light years away. Above NGC 7590 and NGC 7599 is situated the substantial galaxy cluster Abell 1111, dominated by two giant elliptical galaxies - PGC 71042 and PGC 71043. At least three cluster of galaxies can be spotted on the image (see the mouseover for annotations). A more detailed image of the Grus-Quartet, taken with the 12" ASA Astrograph can be found here .

Image details:


Center of field RA 23:18:50 (h:m:s)
Center of field DE -42:16:50 (deg:m:s)
Size 1.23 x 1.23 (deg)
Pixel scale: 1.03 (arcsec/pixel)
Orientation: Up is 179 degrees E of N
Charts and image details obtained from
Optic(s): 16" f3,75 Dream Corrected Astrograph (DCA)
Mount: Astelco NTM-500 direct drive mount
Camera: Apogee Alta U-16M CCD camera
Filters: Lum, Red, Green, Blue Astrodon
Dates/Times: 31 Aug. 2014
Location: Namibia-TIVOLI ASTROFARM, S 23° 27' 40,9" / E 18° 01' 02,2"
Exp. Details:

L15x10min, R:8x10min, G:8x10min, B:8x10min, Bin 1 Total Exposure Time 390 min.

More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2016. All Rights Reserved
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