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Hi Nick It seems that the coma elongation you have seen in your image is also recorded by HST, they comment that the extension is a plume ejected from the sunward side of the comet.
HST observed this comet and gave the following report.
Hubble’s observations are allowing astronomers to more accurately estimate the size of the comet’s solid icy nucleus. The upper limit on the diameter of the nucleus is 5.6 kilometers, though it could be as small as 320 metres across, researchers report. Though the Hubble images put tighter constraints on the nucleus size compared to previous ground-based estimates, the solid heart of the comet presently cannot be directly seen, even by Hubble. Observations from other observatories, including the NASA/ESA/CSA James Webb Space Telescope, will help refine our knowledge about the comet, including its chemical makeup.Hubble also captured a dust plume ejected from the Sun-warmed side of the comet, and the hint of a dust tail streaming away from the nucleus. Hubble’s data yields a dust-loss rate consistent with comets that are first detected around 480 million kilometres from the Sun. This behaviour is much like the signature of previously seen Sun-bound comets originating within our Solar System.
The big difference is that this interstellar visitor originated in some other Solar System elsewhere in our Milky Way galaxy.
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This object has now been officially designated as an interstellar comet
Now officially announced as 3I/ATLAS = C/2025 N1 (ATLAS)
https://minorplanetcenter.net/mpec/K25/K25N12.htmlSuch sad news. Terry was a leader in his field and a man who brought ccd image observing to the UK amateur astronomer world.I knew him for many years (1980’s onwards) via the BAA and TA. I bought and used SX cameras since Starlight Xpress was formed. I still have an SVFH9.Terry was always approachable and was able to advise and help wherever he could.He will be sorely missed by all who know him. Definitely a one off character never to be replaced or surpassed.
RIP Terry Platt
Denis BuczynskiHi James, If they are still available I will buy the Variable stars books, the Chapman book and the Gaposhkin book. Parcel them up and let me know the total price including postage. You will have my postal address, if not mail me privately.
Denis BuczynskiPaul,What type of titles are you wanting to add your astronomical library? I have an extensive collection of of books and magazines ( exaample is S@T 1940 to 2010) and I am looking to downsize in the near future.
Denis BuczynskiMy image taken on the morning of 20250410 from Tarbatness Highland Scotland.
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Hi Martin,
Send me your postal adress and I will post them to you. There are only the two blanks no grinding powder or laps etc. My email is buczynski8166@btinternet.com
Best wishes
DenisHi Martin,
I have two 9.5 inch mirror blanks if you want them for free. One is plate glass the other pyrex. Both are 22mm thick. Let me know if you want them for the price of the postage.
Best wishes
DenisHi again James, I have now looked and found that I have:
1994 Spring Summer Fall.
1995, all four issues
1996 all four issues.
If you want them I can post them to you, let me have your postal address.
DenisHi James,
I think I amy have the magazines you are looking for. I will have to root through my study and see if I can locate them. If so you are welcome to them, maybe a full set!
Denis BuczynskiI once asked Storm about the reason his mother chose his christian name, he told be that if the baby born was a boy she wanted to call him Storm and if it was to a girl she would be named Gale. Simple!
Denis BuczynskiSuch sad news that Storm Dunlop has passed away. He was a long time friend and was always helpful. I enjoyed many occasions with him. A memorable visit in recent years when he and Dave Gavine (his lifelong friend) stayed with me in Scotland. They enjoyed each others company and sometimes bickered.It was like having Statler and Waldorf from the Muppets staying.
Storm was an expert on weather phenomena and was well known and regarded in variable star circles. He translated, from the German, the classic work “Variable Stars” by Hoffmeister, Richter and Wendal. He served as President of the BAA at a very testing and fractious time, and matters did resolve well for him. Nonetheless he did not abandoned his connection with the Association and remained a member to the end of his life. he will be missed and remembered fondly by his many friends.
Denis BuczynskiAttachments:
Hi Jack/ALL,
I don’t seem to be able to open the video you post about. However I assume it is the same as the 24 inch Espin Telescope that I have posted bwout on this forum and on the BAA forum at this link:
https://britastro.org/forums/search/espin+telescope
Here you can read along thread concerning the campaign to save the telescope.
Denis BuczynskiAttachments:
Observations this evening 20240831_01 at Tarbatness shows that UZ Boo is slightly brighter tonight at 15.87 6x90s v band images measured in Astrometrica
Denis Buczynskiobservations tonight at Tarbatness of UZ BOO show the star has faded to 16.11 measured in Astrometrica 6x60s v band 20240830.87872
Denis BuczynskiObservations tonight 20240827-28
Uz Boo#LOCATION=57 50 41.9N 03 47 53.8W H35m
#NAME DATE MAG MAGERR FILT TRANS MTYPE CNAME CMAG KNAME KMAG AIRMASS GROUP CHART NOTES
uz boo 2460550.423 16.133 0.055 v NO STD 144 13.882 121 11.561 na na X37580AA na
uz boo 2460550.424 16.127 0.053 v NO STD 144 13.893 121 11.576 na na X37580AA na
uz boo 2460550.425 15.986 0.053 v NO STD 144 13.924 121 11.584 na na X37580AA na
uz boo 2460550.426 16.248 0.066 v NO STD 144 13.907 121 11.576 na na X37580AA na
uz boo 2460550.427 16.013 0.054 v NO STD 144 13.943 121 11.606 na na X37580AA na
uz boo 2460550.428 16.046 0.056 v NO STD 144 13.922 121 11.604 na na X37580AA naObservations uploaded to VSS Database
DenisThe news that Dundee Council are proposing to close the City’s Mills Observatory is unwelcome. Perhaps BAA members can make their views know by partipipating in this online petition.
Denis Buczynski
https://www.change.org/p/mills-observatory-closure?recruited_by_id=eb79e340-1db3-11ef-832c-2386420cb3d8&utm_source=share_petition&utm_campaign=psf_combo_share_initial&utm_term=psf&utm_medium=copylinkAttachments:
Hello all, My comet astrometry records for the first half of this year 2024 Jan to May show that I was able to observe comets and report astrometry and photometry on 34 nights from Tarbatness in Highland Scotland at Lat 58d N. This is better than 2023 for the same period when I observed on 25 nights.All night twilight will now prevent me from comet imaging between mid May to mid August.
Denis Buczynski MPC Code I81My comet observing stats .
I came across these observing stats at the link copied below.
These are my observing stats since I came here to observe in 2011 at MPC Code I81
Apparently, according to this data list I sit at number 55 out of 1670 observing stations having observed measured and reported on 427 comets.Nr.Station All MPECs Discovery MPECs Observations
55 I81 220 19 197182011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023
58 276 380 500 1374 1446 2274 1431 2135 2091 3419 2872 1462
I81 has discovered 0 objects. It has made 19718 of all 808978 observations (2 %) at 427 objects in all MPECs with involved station I81.
There are 2457 of all 87283 observations (3 %) at 110 objects in all discovery MPECs with involved station I81.Denis
