Hi All,

Consider ourselves told off!  It’s true that incorrect subject lines are a pain.

Here’s my rather poor effort to show more clearly the inner coma structure from last night’s image, see attached.

Peter

Sent from Mail for Windows 10

From: Nick James
Sent: 17 May 2020 11:47
To: baa-comet@simplelists.com
Subject: [BAA Comets] C/2017 T2 coma structure

Hi Andrew/Peter/Denis,

The discussion has changed from C/2019 Y4 to C/2017 T2 so I have changed

the subject line. Your director gets *very* annoyed when discussions on

one comet are under the subject heading of another! It makes finding

things later very difficult.

Anyway, C/2017 T2 has had an interesting inner coma structure for quite

some time. My last decent image was on April 25 (I've been distracted by

Y4 recently) but the comet clearly showed an outflow of material to the

north which turned back down the tail. The attached image shows that.

The orientation has changed in the three weeks compared to Peter's image

but the feature is remarkably stable.

Nick.

On 17/05/2020 11:38, Peter Carson wrote:

> Hi Andrew,

>

> Here’s my image from last night (16^th ). I’m only seeing one obvious tail

> although it is over 30’ long. There’s something going on in the coma, its not

> evenly bright. Its appears to have a brighter sector towards the NE which ties

> up with the PA of your suspected second tail. How far out from the centre of the

> coma were you seeing your suspected second tail?

>

> All the best

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