Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)
Sharpless 188, Simeis 22 "Dolphin nebula" shot in Ha OIII RGB, Boyan Kassabov
Sharpless 188, Simeis 22 "Dolphin nebula" shot in Ha OIII RGB
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Sharpless 188, Simeis 22 "Dolphin nebula" shot in Ha OIII RGB

Sharpless 188, Simeis 22 "Dolphin nebula" shot in Ha OIII RGB, Boyan Kassabov
Sharpless 188, Simeis 22 "Dolphin nebula" shot in Ha OIII RGB
Powered byPixInsight

Sharpless 188, Simeis 22 "Dolphin nebula" shot in Ha OIII RGB

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Description

After 6 years, I returned to this object, hoping that pouring more hours will do quite another picture. Actually it looks better (mainly cause it's colored|, but this was one of the most difficult objects to process - for me. After 30 hrs of data. I'm still not quite happy the beautiful faint gas that is floating away from the ring, is not very well visible...at least in my post processing.

About the object - the only information I found, is this is a planetary nebula (no kiiding?), which emits red light. i would say it contains fair amount of Oxygen too, cause its center glows enough in OIII filter. Don't have SII filter, so - never tried it.

Comments

Revisions

  • Sharpless 188, Simeis 22 "Dolphin nebula" shot in Ha OIII RGB, Boyan Kassabov
    Original
  • Sharpless 188, Simeis 22 "Dolphin nebula" shot in Ha OIII RGB, Boyan Kassabov
    C
  • Final
    Sharpless 188, Simeis 22 "Dolphin nebula" shot in Ha OIII RGB, Boyan Kassabov
    D

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Sky plot

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Sharpless 188, Simeis 22 "Dolphin nebula" shot in Ha OIII RGB, Boyan Kassabov