Celestial hemisphere:  Northern  ·  Constellation: Pegasus (Peg)  ·  Contains:  NGC 7317  ·  NGC 7318  ·  NGC 7319  ·  NGC 7320  ·  PGC 141041  ·  PGC 69218  ·  PGC 69260  ·  PGC 69279  ·  Stephan's Quintet
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Stephan's Quintet - HCG 92, Rafał Szwejkowski

Stephan's Quintet - HCG 92

Getting plate-solving status, please wait...
Stephan's Quintet - HCG 92, Rafał Szwejkowski

Stephan's Quintet - HCG 92

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Description

Most famous of all Hickson compact galaxy groups, this iconic target is the furthest subject I've imaged to date.  It's very difficult to achieve visibility of the tidal tails and avoid over-denoising.  The targets are mag 14 or fainter, surface brightness of the tails must be substantially less.

Ha filter only worked for the nearby NGC 7320, the redshift of the proper group puts Ha emission way outside of 3nm bandpass.

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Stephan's Quintet - HCG 92, Rafał Szwejkowski