Celestial hemisphere:  Northern  ·  Constellation: Draco (Dra)  ·  Contains:  NGC 3147
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NGC 3147, a "superoutburst" of V* CP Draconis and a smidge of IFN, Lyn Peterson
NGC 3147, a "superoutburst" of V* CP Draconis and a smidge of IFN
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NGC 3147, a "superoutburst" of V* CP Draconis and a smidge of IFN

Getting plate-solving status, please wait...
NGC 3147, a "superoutburst" of V* CP Draconis and a smidge of IFN, Lyn Peterson
NGC 3147, a "superoutburst" of V* CP Draconis and a smidge of IFN
Powered byPixInsight

NGC 3147, a "superoutburst" of V* CP Draconis and a smidge of IFN

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I noted that there was a "star" visible in some subframes (3/21/21, 2/11/23, 2/14/23, 2/18/23,       and not in others(10/30/22, 11/27/22) .    image.png

After some research (I am not an astronomer by any means) I found this @rhedden  post in Astrobin:  https://www.astrobin.com/sz79ij/  with a reference to this paper:  https://arxiv.org/ftp/arxiv/papers/1001/1001.5059.pdf .  According to the paper, this is called a superoutburst. Also:  Dwarf Nova of CP Draconis close to NGC 3147 imaged by the Liverpool Astronomical Society Supernova Search team on 4th June 2013: here   and several entries in AAVSO.

@BrendanMartin was kind to refer to his society's newsletter:  https://drive.google.com/file/d/17GgF23Op_vy-NGSwcUSnaRTwKEfFhhXz/view

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NGC 3147, a "superoutburst" of V* CP Draconis and a smidge of IFN, Lyn Peterson