Hi Nick

I imaged 12P about at the same time. I do not use an astrometric software, but I can compare the nuclear magnitude with the magnitude of unsaturared field stars using the Skymap database. This is what I get:

12P nuclear (square 26x26'') magnitude between October 31.724 and October 31.791. C11+reducer+ZWO ASI 1600MM PRO, no filters, frames of 30 s

frame 006 - start at 17.22.56 UT
relative to a GSC 3096-2108 (12.42) : 12.44
  ''       ''         GSC 3096-1910 (13.23) : 12.42
  ''       ''         GSC 3096-0750 (14.05) : 12.5
  ''       ''         GSC 3096-1206 (13.88) : 12.4

frame 099 - start at 18.10.47 UT
relative to a GSC 3096-2108 (12.42) : 12.63
  ''       ''         GSC 3096-1910 (13.23) : 12.47
  ''       ''         GSC 3096-0750 (14.05) : 12.48
  ''       ''         GSC 3096-1206 (13.88) : 12.49


frame 192 - start at 18.58.38 UT
relative to a GSC 3096-2108 (12.42) : 12.64
  ''       ''         GSC 3096-1910 (13.23) : 12.6
  ''       ''        GSC 3096-0750 (14.05) : 12.48
  ''       ''        GSC 3096-1206 (13.88) : 12.31

Obviously if you want I can send the FTS files.

best wishes

Fabrizio Montanucci - Rome, Italy

12P in outburst again - Nick James (31 Oct 2023 19:15 UTC)

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12P in outburst again by Nick James (31 Oct 2023 19:15 UTC)
Reply to list

Denis Buczynski, Tarbatness, reports that 12P is in outburst again. He
gets a g magnitude of 12.9 from an image taken at Oct 31.76. Francois
Kugel also reports the outburst at Oct 31.74.

Richard Miles reports that the Comet Chasers group have a measurement of
15.87G at Oct 31.19.

If you have any observations between these two times please report them
to the section.

Nick James. Director.

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