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Hickson 91 - Distant Galaxies in Piscis Austrinus

In the center of this image known as the Hickson 91 compact galaxy group NGC7214 is situated, a distorted type SB(s)bc galaxy at mag 13 at a distance of approx. 320 million light-years. The pronounced tidal streams indicate an interaction with the apparently close situated mag 16 barred galaxy PGC 68155 in approx. 339 million light-years distance.

To the lower right the mag 15 face-on galaxy PGC 68160 is shining in a similar distance. Two other brighter an detailed galaxies can be seen at upper left side mag 13.6 IC 5168 and to the lower right mag 15.6 PGC 68164.

PGC 748618 at mag 18.3 can be seen in a inverse close-up at bottom at redshift of 47.577 km/s or approx.. 2 billion light-years distance featuring a distinct tidal tail. Faint galaxies down to mag 26 with an S/N of 5 can be observed in this 3.5 arc-min wide image crop. This image can be recognized as deepest amateur image so far, see Excel evaluation here.

Image data: LRGB (560-180-160-160 min) total 17.7 h, north is down, seeing 0.8-1.2 arc-sec,
80cm f/7 Astrooptik Keller cassegrain, FLI PL-16803, Baader filters, Prompt 7 CTIO Chile
Processing: Johannes Schedler   APOD on Mar 24, 2016

Find below a full frame image in 25/70% size, a central crop in 50/100% size, an inverted annotated version in 30/70% size and at bottom an annotated inverted crop on PGC 748618 in 100% size.

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click for 100% size

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Last modified on Friday, 25 March 2016 08:22

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