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Hi Sally,
A wonderful idea. I am investigating whether it will be possible to publish these challenges.
Last year was special as we held a virtual Winchester with livestreams and recordings of the talks. This year we were not able to broadcast or record the talks at the venue. Hence it comes down to whether the lecturers give permission their talks to be published, noting sometimes lecture material is used for more than one event or isn’t in a suitable format to be easily published on a website.
Best wishes,
AndyHi Nick,
I remembering seeing similar behaviour in Maxim DL if I didn’t set the options to save the stretched image to the dynamic range of the output file. I think what is happening is you are displaying the image with a certain stretch applied to the image brightness, setting what is dark to light. However, what is being saved is unstretched or a different dark to light stretch. This may be more important for jpeg as I think they have a limited dynamic range of 8-bit.
Best wishes,
AndyHi John,
Thanks for pointing this out. The file of the corrected libration charts had gone missing, so I’ve added it back. Also the link in the file needed updating as it broke with the website migration. Also now fixed. It just goes to the handbook area of the website as this won’t break if individual files are replaced.
Best wishes,
AndyHi Grant,
Here is my understanding, though someone with more knowledge of how far this got may jump in.
The important point is the BAA was not engaging the programmers. This was to be an allocation of time from a commercial operation being setup by a BAA member. In other words this would not have been exclusively for the BAA, and the responsibility of how the IT worked was not with the BAA. Though obviously the BAA would have agreed a way to grant member access for this to go ahead. I just don’t think it reached that stage.
Best wishes,
AndyHi Grant,
My understanding is this was to be made possible via a generous allocation of time from a BAA Member who was setting up a commercial observatory. The BAA President gave a brief update recently, I think at the DSS Annual Meeting held as a webinar. The war in Ukraine put a hold on the project as the software developers are based in Ukraine.
I’m not sure it had got as far as working out how members would request observing time.
AndyIn case anyone is experiencing timeouts when logging in, this is to let you know we are aware of the problem.
It isn’t the BAA website causing the problem. The problem is at an authentication server used by Sheep CRM, employing standard software for single sign on authentication. They have tried upgrading the server, though as we have still experienced some timeouts they are doing further investigations.
If you experience a timeout, then I’ve found trying again a minute later usually works as it is an intermittent problem.
AndyHi Peter,
This is the expected behaviour. Your username is now your email address.
We’ve asked this to be updated in systems to state “email address” to avoid confusion, but this will take a while to implement.
Best wishes,
AndyIf you log out and then click to log back in without closing your browser, then you will not be asked to re-enter your password. If you close your browser, then you will be asked to re-enter your email address and password at login.
We are investigating whether there are ways to always require your email address and password to be entered. Otherwise please note you should close your browser after logging out if other people may use the computer.
Andy
Hi Jack,
I got myself a Celestron NexYZ adapter last year. I found it is good and stable with lots of adjustments.
https://www.firstlightoptics.com/adapters/celestron-nexyz-3-axis-universal-smartphone-adapter.html
My mobile phone images are nowhere near as good as I get with even a cheap astro CMOS camera, but nice for a quick image without the hassle of connecting a laptop.
Best wishes,
Andy
Please note the following corrections to the Venus conjunctions on page 24 of the 2022 Handbook.
Venus Superior Conjunction
Should read “Superior Conjunction: Oct. 22” not “Superior Conjunction: -”
This is correct in the Sky Diary – page 5
Actual UT time of Venus superior conjunction – 2022 Oct 22 21:17Venus Inferior Conjunction
Should read “Inferior Conjunction: Jan. 9” not “Inferior Conjunction: Jan. 8”
This event is omitted from the Sky Diary – should be page 4
Actual UT time of Venus inferior conjunction – 2022 Jan 9 0:48I’ve created a PDF of errata on the Handbook webpage.
https://britastro.org/handbook
Andy
Hi Denis,
I just realised I was too quick in my reply as you were asking for the citations, not the list. I think they appear in the Journal, though I am checking. Could be a good thing to publish separately on the website.
Best wishes,
Andy
Hi Denis,
You can find them under the menu option About us -> Awards.
https://www.britastro.org/about-awards
Best wishes,
Andy
I must admit to having mixed feelings about the BAA setting up a remote telescope. I’m torn as I think it is a fabulous idea but could easily go horribly wrong unless you have someone experienced in setting up remote observatories running the project. If such a person or even better a group of people could be found then I’d have much more confidence in such an endeavour.
I wonder if a first step would be to partially or fully fund access to existing remote observatories for members. I think this existed in the past but I am unsure how well it was used. If that proved popular or couldn’t provide what members want such as a scientific photometry capability, then look at our own remote setup.
Another thing to consider with a remote setup. It is not just getting it up and running and serviceable onsite. It is also setting up a way for members to access the telescope including time allocation. The existing providers have solved these problems.
Unless anyone has any objections, I propose we move this into a thread on project proposals or remote observing, rather than under the heading of the “AGM Livestream”. I can have a go at sorting a switch early next week.
Best wishes,
Andy
I must admit to having mixed feelings about the BAA setting up a remote telescope. I’m torn as I think it is a fabulous idea but could easily go horribly wrong unless you have someone experienced in setting up remote observatories running the project. If such a person or even better a group of people could be found then I’d have much more confidence in such an endeavour.
I wonder if a first step would be to partially or fully fund access to existing remote observatories for members. I think this existed in the past but I am unsure how well it was used. If that proved popular or couldn’t provide what members want such as a scientific photometry capability, then look at our own remote setup.
Another thing to consider with a remote setup. It is not just getting it up and running and serviceable onsite. It is also setting up a way for members to access the telescope including time allocation. The existing providers have solved these problems.
Unless anyone has any objections, I propose we move this into a thread on project proposals or remote observing, rather than under the heading of the “AGM Livestream”. I can have a go at sorting a switch early next week.
Best wishes,
Andy
Hi Robin,
Both Sections may be interested. When I did photometry of AGN I had contact both the VSS and DSS.
Cheers,
Andy
Hi Bill,
The BAA Office forwarded me your email and I replied this afternoon. This was a typo introduced when I created the email in EventBrite. It tried to automatically work out the link and unfortunately it added “.)” from the end of the sentence corrupting the link. Apologies I didn’t spot this in my checks of the email before sending. The correct link is:
https://test-for-coronavirus.service.gov.uk/collect-lateral-flow-kits
The IOP updated their guidance and requirements for the AGM after we had advertised it, so it seemed prudent to email attendees with the updated information. They have relaxed their original requirements to be more inline with other public buildings, for example COVID passes are no longer required.
These are the free lateral flow tests you can get from your local pharmacy, though now you have to provide a code. This link allows you to get a code. This is what I have to do when I go to university. I am required to take these tests twice a week when I visit campus regardless of vaccination status. Note the IOP are not requiring these tests, simply encouraging their use.
As venues get back to in-person events they are all faced with tricky decisions about where to draw the line. The virus has not gone away and so they are doing their best to tread a line between doing nothing and risking spread at their venue, or doing so much that it discourages anyone from attending. The IOP allow the BAA to use their venue and provide their staff on a Saturday all for free.
Best wishes,
Andy
Fantastic spectra Robin!
It is an intriguing method for learning about other planetary systems.
Andy
Robin, that is an interesting analysis of the AAVSO data.
I’ve taken a brief look at a couple of the papers and there is mention of different durations of totality. For the 1997-98 Graczyk et al (1999) found totality lasted 450d in U-B and 477d in B-V. While for the 1976-78 Saito et al (1980) found totality lasted just 300d, and Saito note this is “shorter than those estimated during earlier eclipses“.
I’ve not read them in detail, though I wonder if this is a clue to what is happening..
The duration Hugh found is closer to 300d than 450d, at 332d using H-beta. This appears similar to the AAVSO data analysed by Robin, where by eye it looks to be just over 300d.
Cheers,
Andy
Indeed an excellent paper by Hugh. Great to see spectra from multiple observers contributing to Hugh’s research on VV Cep.
The shift in central eclipse timing without an apparent long term change in period is a puzzle. It would be interesting to know how accurate the various central timings were over the past hundred years. I wondered whether there was any possibility that different spectral features were used to estimate the central eclipse in early work compared to modern work of the 1990’s and onwards, resulting in a systematic shift in observed in the central time.
Cheers,
Andy
Hi Tor,
The detail of the theory explains both of these problems. Indeed I believe that the Earth and Moon have similar surface compositions is one of the key lines of evidence for the theory.
First, this happened during the formation of the solar system, when there may have been more planets than we find in the solar system today. The proto-Earth and its impactor, another protoplanet probably of similar size to Mars, would have been in similar orbits. The planets would interact gravitationally which could shift them into different orbits, eject one of the protoplanets out of the solar system, or as in this theory the protoplanets collided. The merged planet and moon would follow a similar orbit around the Sun to the original protoplanets. It is worth noting this orbit isn’t necessarily exactly where the Earth and Moon are found today as gravitational interactions between the planets were common in the early solar system, before the planets settled into the orbits we find today.
In the massive impact, the outer surface of the proto-Earth and the impactor would get mixed together. Some of this material would be ejected into space, settle into an orbit around the Earth and coalesce to form the Moon. Hence the surface of the Earth and Moon are similar compositions, a blend of the proto-Earth’s surface and the impactor. You can get a better idea from this video.
https://www.youtube.com/watch?v=BoU9OA92trA
Best wishes,
Andy
