Celestial hemisphere:  Northern  ·  Constellation: Pegasus (Peg)  ·  Contains:  NGC 7317  ·  NGC 7318  ·  NGC 7319  ·  NGC 7320  ·  Stephan's Quintet
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Stephans Quintett - tidal tales in luminance, Lars Stephan
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Stephans Quintett - tidal tales in luminance

Getting plate-solving status, please wait...
Stephans Quintett - tidal tales in luminance, Lars Stephan
Powered byPixInsight

Stephans Quintett - tidal tales in luminance

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Description

The imaging datas are identical with this NGC 7331

For the luminance are processed:

L: 133 x 60 s (13.10.2018)

L: 103 x 90 s (30.10.2019)

L from R/G/B: 40/30/40 x 90 s (31.10.2019)

(total 7,5 hours)

It can be read everywhere about Stephan's quintett that the galaxy NGC 7320 is about 35 million light-years away and therefore does not belong spatially to the others that are about 300 million light-years away. Peter Riepe's comments on the "Astrophoto of the week" of the 52nd week in 2014 in the german astronomie-forum are interesting on this question:

https://www.astronomie.de/neuigkeiten//52-woche-ngc7331-stephans-quintett-und-hintergrundgalaxien/

He refers to recent measurments of the redshift of NGC 7320. Quote:

" In a publication by Woods D.F., Geller M. and Barton E.J. (2006), redshifts were measured in pairs for 345 galaxies. And as can be read in the SIMBAD database, 5779 km/s have now been measured for NGC 7320. This galaxy is now in Stephan's quintet after all !"

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Stephans Quintett - tidal tales in luminance, Lars Stephan