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It was a brilliant weekend and my personal highlight was the Steve and Dave double act on Sunday. A very entertaining presentation about the Crayford Dobsonians. All the other talks throughout the weekend were great too. Shame I missed the Friday night.
Thanks very much to Ann and Alan and everyone else involved in arranging it.
I think it is at least the sixth this year.
Have a look here for an up-to-date list. They often don’t get announced in ATELs.
Currently TNS[/url] is the main database now but some discoverers still post on the TOCP.There tend to be several novae a month in M31 but a lot of people are looking for them so it is hard to claim a discovery. George Carey got AT2022eng recently along with Kamil and the Czech team.
I’m not surprised it got silly. The slug was an odd one though. It was the unit of gravitational mass in the FPS system but I don’t think it got used much.
Thanks for explaining that Dominic. I know that a huge amount of work has gone into the new site and it will take some time to iron out the problems but I didn’t know whether this was by design or not.
This was an interesting event. A few minutes before impact it would have been visible at around 11th magnitude moving rapidly across the sky as seen from the UK.
I like examples of NTUs (non-technical units) when describing the characteristics of astronomical objects. Bill Barton alerted me to this classic example in the Mail Online.
Attachments:
I first met Ron not long after he became a TV star for his early recovery, with Alan Young, of 1P/Halley and have always marvelled at the quality of his work. He was very innovative and came up with loads of excellent ideas including is own cold camera and comet offset guiding attachment. There is a pretty good summary of Ron and his work along with a photo of Ron with his home-built 16-inch here:
http://mstecker.com/pages/apparbour.htm
His SNe discovery record is testament to his skill and dedication. Ron always regretted replacing that telescope with an “inferior” commercial instrument and mount.
I will miss our regular email exchanges and my annual meeting with Ron and Pat after Winchester when I would discover what new equipment Ron was testing, usually in the living room. Pat was very tolerant.
Another of the BAA astronomy greats gone. Deepest condolences to Pat.
Why have such a low limit? Maybe increase it to 10 to be sure. If we start getting spam posts from members then we can handle that at the time.
On the old site the latest forum posts were on the front page but this is not currently the case with the new site. That is a shame since the forum is the most interactive part of the site. I know that you can get to the forum via the community tab but many people and casual visitors will not bother to do that. Can we get the latest forum posts back on the front page please?
My astrometry gave 16.1 last night for JWST. It varies a lot. It is still moving north and it reaches max declination north (about +19 deg) about mid March. It will cross the equator in the middle of April and then head south for a while. I haven’t tried for the booster since Feb 10 when it was around mag 20.3.
That is a very unusual mount but clearly very effective since he discovered 10 comets from 1873 through to 1912:
19P/Borrelly, C/1873 Q1 (Borrelly), C/1874 O1 (Borrelly), C/1874 X1 (Borrelly), C/1877 C1 (Borrelly), C/1889 X1 (Borrelly), C/1900 O1 (Borrelly-Brooks), C/1903 M1 (Borrelly), C/1909 L1 (Borrelly-Daniel), C/1912 V1 (Borrelly)
I assume that they were all with this instrument but I haven’t checked.
This is such a shock. I met Rob quite a few times in the 90’s. He was a great observer and did a lot for the Lunar Section at that time. Rob observed quite a few comets too and we have some examples of his notebooks in the Comet Section archives:
https://britastro.org/cometobs/1969y1/1969y1_19700331_0345_rmoseley.html
https://britastro.org/cometobs/1987p1/1987p1_19871028_rmoseley.html
https://britastro.org/cometobs/1988a1/1988a1_19880510_rmoseley.htmlIf you haven’t seen it yet there is an amazing “selfie” of JWST’s primary mirror on the JWST blog taken using the pupil imaging lens in NIRCam.
Isn’t the web wonderful? I like this statement at the top of that page: “Once the book has been published (anticipated publication date May 2005), the download option will be disabled, so authors should take advantage of the opportunity to download their chapters now”.
That’s a very interesting observation.
There is an entire chapter on this in Comets II (edited by Festou, Keller and Weaver) which describes the generation and distribution of species in the coma (pp 425 onwards). It was published in 2004 before much of the recent space-based observations of comets but it is an excellent reference book if you can get hold of a copy. I can see some second-hand around £60 online. The book is so massive that it is in imminent danger of collapsing under its own gravity. A more recent book, “An introduction to comets” by Nicolas Thomas is post-Rosetta and also covers this.
I run my RMS cameras at 1920×1080, the normal configuration is 1280×720. This increases the file size a bit. I also use ffmpeg at a higher quality level.
This one is drifting slowly in alt/az downwards and to the right. It is NORAD 21893 (Superbird B1) which was launched in 1992 and which is long defunct. It is in a highly inclined (14 deg) graveyard orbit. Uncontrolled GEOs are perturbed by lunar and solar gravity and their inclination drifts away from 0 deg.
It is almost stationary in alt/az so must be near GEO. Candidates are Eutelsat W2, Telstar 6 and Meteosat 8. All three are drifting slowly slightly above GEO in the graveyard.
As of Feb 3 the telescope is pointing at HD 84406 in UMa. This should mean that we can calculate the aspect angle of the sunshield and the effect this has on the apparent magnitude as seen from the Earth. It might explain why the telescope was so much brighter last night. The optical collimation has now begun and the blog has a fascinating description of how it will be done. It is well worth a read.
