British Astronomical Association
Supporting amateur astronomers since 1890

Secondary menu

Main menu

Home Forums Comets
Terms of use

C/2017 S3

11 posts / 0 new
Last post
djswan2002's picture
Offline
Last seen: 6 hours 20 min ago
Joined: 20/04/2017 - 19:58
C/2017 S3

Another outburst? I am imaging now and it is much brighter than I expected. Worth having a look visually too.

See the screenshot.

David

Attachments: 
AttachmentSize
Image icon C2017S3.png454.23 KB
djswan2002's picture
Offline
Last seen: 6 hours 20 min ago
Joined: 20/04/2017 - 19:58
10 x 10s stack

Looking quite spectacular as a big fuzzball moving through the star field.

Peter Carson's picture
Offline
Last seen: 3 days 6 hours ago
Joined: 06/04/2014 - 20:41
New Outburst C/2017S3 PanSTARRS

Hello David,

Yes indeed it's a new outburst...well spotted.

Here's my image taken last night 2018 July 14th at 2358UT.

Peter

djswan2002's picture
Offline
Last seen: 6 hours 20 min ago
Joined: 20/04/2017 - 19:58
Update

The coma looks like it has expanded significantly since last night. Still bright and quite something.

nickjames's picture
Offline
Last seen: 4 hours 13 min ago
Joined: 12/10/2013 - 18:16
Indeed. It is a really nice

Indeed. It is a really nice comet tonight. Here is my image. I get an integrated magnitude of 8.49 and a coma diameter of almost 6 arcmin.

Nick.

nickjames's picture
Offline
Last seen: 4 hours 13 min ago
Joined: 12/10/2013 - 18:16
The comet continues to

The comet continues to brighten. There is a news item here which explains more.

djswan2002's picture
Offline
Last seen: 6 hours 20 min ago
Joined: 20/04/2017 - 19:58
Dimming?

Not looking as impressive this evening (20 Jul / 2300 BST). Fingers crossed that this isn't the beginning of the end....

djswan2002's picture
Offline
Last seen: 6 hours 20 min ago
Joined: 20/04/2017 - 19:58
Evening of 20th July

Transparency poor, but managed 10 frames when it seemed to clear slightly. 10 x 10s

nickjames's picture
Offline
Last seen: 4 hours 13 min ago
Joined: 12/10/2013 - 18:16
It was cloudy here last night

It was cloudy here last night so no data from me but it does appear to be fading if you look at the latest estimates here. My news article on the front page was clearly the kiss of death! Michael J├Ąger reports no sign of the tail last night in deep images obtained on July 21.05. David Levy's famous quote about comets: "Comets are like cats, they have tails and do what they want" is quite appropriate I think. We just need to keep observing and see what happens next.

nickjames's picture
Offline
Last seen: 4 hours 13 min ago
Joined: 12/10/2013 - 18:16
It continues to fade. I made

It continues to fade. I made it 9.4 earlier today. It is still there though and there are no apparent signs of disruption so we might get another outburst soon. Keep an eye on this object at every possible opportunity.

nickjames's picture
Offline
Last seen: 4 hours 13 min ago
Joined: 12/10/2013 - 18:16
The coma profile for the past

The coma profile for the past few nights shows that it is much more diffuse this morning and I think we are witnessing its final days.

Attachments: