Hi Nick,

Very well-done and interesting article. I have a question on the images that detail the various fragment designations (Figure 6).

What is the significance of the lower-case letters? 'a' is less bright yes, but why A and a? Is that to indicate that 'a' came from 'A,' which would make sense. Still, why not simply a different letter? And what is up with FF? What happened to E? Did it fade out? There looks to be a fragment behind A that isn't labeled. I know that this isn't your image (not your labels), but Is there some significance to the nomenclature?

Again, well-done.

Charles

On Sunday, May 3, 2020, 11:21:35 PM PDT, Nick James <ndj@nickdjames.com> wrote:

Morning all,

I thought I would share with you a news note that I have just prepared

for the next edition of the Journal of the BAA. It will probably be

edited for length and content prior to publication but I think it

demonstrates the amazing work that amateurs were able to do during the

recent fragmentation event. Many thanks to everyone who submitted

images, astrometry and photometry to the BAA over this period.

I also attach an animated GIF showing the images included in figure 5

run together as a movie. The sudden appearance of fragment A on April 9

and its subsequent drift down the tail is quite dramatic.

Keep observing this comet as it heads in to perihelion. Most large

professional telescopes are now unable to see it since the elongation is

small.

Nick.

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