A question for comet experts.

I've been reprocessing my C/2021-A1 Leonard photos, and I noticed that if I zoom in on parts of the histogram, I see a teardrop shape close the nucleus. Is this showing the edge of the magnetic cavity?

Shown with exaggerated curves (and then with more regular coloring), with a diagram from the ESA here for comparison:

https://www.esa.int/ESA_Multimedia/Images/2002/12/Structure_of_a_comet

#astrodon #astronomy #astrophotography