Thanks for all of the observations of the Jan 19 disconnection event. I
should be able to work out velocities and the time of the magnetic field
boundary crossing with the data I have received. I can then compare this
with the expected environment in the region of the comet.

Before spacraft comet ion tails were the only way to measure the
interplanetary magnetic field and the solar wind in situ.

Since Jan 19 the ion tail has been much fainter and this morning it
looked very different to the day before:

https://britastro.org/observations/observation.php?id=20230121_063542_098aeb0bd999d079

Nick.

On 19/01/2023 13:49, Peter Tickner - peter.tickner1472 at btinternet.com
(via baa-comet list) wrote:
> I've also now put a normal animation n my Flickr page which is better
> quality - link is: https://flic.kr/p/2ocmo58
>
>
>
> Peter T
>
>
>
> From: baa-comet@simplelists.com [mailto:baa-comet@simplelists.com]
> Sent: 19 January 2023 12:59
> To: baa-comet@simplelists.com
> Cc: 'Nick James'
> Subject: [BAA Comets] E3 tail separation
>
>
>
> I've managed to upload an animated gif to my BAA member's page with much
> reduced file sizes (my original images are all full frame!) which shows that
> the separation process was already under way when I started imaging at 01:50
> UT.
>
>
>
> If anyone has any helpful ideas how I might better process and present the
> data from my images I'd welcome the advice!
>
>
>
> Peter T
>
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