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Semeis 22 - Dolphin Nebula (PNe)

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#1 Peregrinatum

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Posted 31 October 2020 - 03:03 PM

Semeis 22 is the Dolphin Nebula, but it looks more like a Marlin to me Lol  it is an ancient planetary nebula with a major diameter of 9', visual mag is listed as 16 but the camera thinks it is much brighter than that, may 13 magnitude?

This is 24 hours of Ha/O3/S2 shot with the C925HD at F10 using the ASI294MM, avg moon about 80%, 19.3 mag skies (although with the moon glow probaly < 19), processed in SHO using Pixinsight.

Thanks for looking and stay safe out there!

 

JBKWFjwl.jpg


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#2 sunnyday

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Posted 31 October 2020 - 05:17 PM

wow, fantastic details , thanks .


Edited by sunnyday, 31 October 2020 - 05:18 PM.

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