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To
the right you see the whole field around these two small
galaxies (in fact huge and distant, above the bright star HD8648 of
7.4m) in the Cetus constellation (and many smaller in the
background). For decent picture rather
small details in arms of the spiral galaxy NGC 521 should be
adequately captured and some larger scope than that mine would be
desirable. It has been, however, photographed quite rarely
and I still believed that it's
worth a try.
I made use of a single clear
night before the October
new Moon
(and unfortunately the forecast for next days is not
positive). I had also some problems and the total exposure
was relatively short.
Next day, after data processing, it emerged that the
resulting picture was nevertheless not so bad. And while it
was supposed to be
something like a preliminary version, I was in fact already
satisfied. It is surely not perfect, but probably quite decent
within the bounds of
possibility. Take a look at the more detailed (in
full resolution) crop at
the bottom.
As usually I also marked here (right from the bright star) a
quasar with redshift z=3.63.
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And what about our galaxies says wikipedia:
NGC
521, also occasionally referred to as PGC 5190 or UGC
962, is a barred spiral galaxy located approximately 224
million light-years in the constellation Cetus. It was
discovered on 8 October 1785 by astronomer William Herschel. NGC
533 is an elliptical galaxy in the
constellation Cetus. It was also discovered (the same night)
by William Herschel. It was described as "pretty bright,
pretty large, round, gradually brighter middle" by John
Louis Emil Dreyer, the compiler of the New General
Catalogue.
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Optics:
NoName Newton 192/800
+GPU c.c.
Camera:
Atik One6
Filters:
LRGB Baader
Mount:
SW AZEQ-6
Guider:
Lacerta MGEN
Exposure:
22x5
min. (L)
7x5 min. (R, G, B each), bin 2x2
Software: PixInsight, Photoshop
18.10. 2025
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