callump
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Posts posted by callump
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There have been many occasions recently when we were clouded out in the north of Scotland, when a strong aurora has been seen in the north of england and further south. Although the height is a couple of hundred miles or so, when there is a very strong aurora, whole auroral oval expands southwards. So whilst people in the south might just see rays peeking above the horizon, those in he north will see the display overhead, or even reaching the southern horizon.
Callum
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Although on a remote Scottish island, we get post deliveries every day except Sunday by Royal Mail, the only disruption occurs when the weather is too bad for the boats to sail. Mostly 24hr mail arrives next day or a day after, and on the whole it is the preferred method. DPD / UPS / Evri etc. go to Kirkwall and then our local agent picks those up and delivers three times each week.
Callum
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Here's an article about capturing cosmic rays with a DSLR:
https://britastro.org/2023/capturing-cosmic-rays-with-a-digital-camera
Callum
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Thanks Paul - not sure what went wrong there!
Callum
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I've made a video of highlights of the auroral display on the night of 1st to 2nd Dec.
Mostly its the overnight timelapse, but also some real-time video footage.
You can watch on YouTube
Enjoy,
/callump
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A spectacular display of the northern lights on Orkney, started around 18:15 and kept on going until midnight. Multiple bands and patches reaching even to near the southern horizon. Lots of nice ray action.
Just a few of the approx 500 pics taken. Sony A7s, Loxia 21mm lens at f/2.8, ISO4000 (don't ask), 3.2 or 2s exposures. No post-processing.
A memorable night.
/callump
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On Orkney, was a great show earlier but a bit quieter now (21:40) - though still a nice double arc with rays and structure going on. Will need to get another splurge if it's going to be seen from further south which may happen, and with the Moon rising will get in the way. Pics still on my DSLR but here's a recent shot from my aurora-cam.
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Rousay, Orkney: I made a 'slow' video of the midnight sun last night (22/23 June) - from 22:00 to 02:30 UT - using my aurora-cam tweaked for short exposures. Local midnight is at about 00:13 UT. Did not spot any NLCs. I've posted it on YouTube at
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Pi 4's now seem to be out of stock on PiHut now - but starter kits available if you need the extras.
Callum
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Pi hut had stock of 4gb pi4’s last night
omly one per order or customer
not sure if they have any left now /callump
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Not sure where I heard, but there should be plenty of stocks of RPi4s in June.
/callump -
For most auroras at northerly UK locations, a display is just white/grey to the naked eye. On occasions when the aurora is very intense red colour can be seen. Which I have seen from Orkney and from Gloucestershire.
Cameras do pick up the colour well, but the apparent intensity depends on the processing done. I try to minimise the processing to achieve a more restrained presentation.
We had a very bright aurora on Orkney on March 23, and I also took some real-time video - though it still shows some green / red tinges it is a pretty good representation of what the naked eye sees.
I made a video of the display at:
/callump
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Not one of Martin's brews 🙂
Used to be the Red Lion, but we always went to the Crown (if drinking in Goostrey).
/callump
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Personally, i'd just use whatever exterior grade ply you can get and not stress too much about it.
A good coat of varnish will seal against the elements.
All depends on whether you want to look through it, or at it...
/callump
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Howard Banich talked about this on a BAA Webinar:
/callump
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According the to NASA Extragalactic Database (NED) - NGC 5471 has a Hubble flow distance of 6.15 MPc. As its thought to be a companion of or associated with M 101 its about the same order.
/callump
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The 2023 BAA Deep Sky Section meeting will be held at Bedford School, Bedford on 19th March 2023
All welcome.
Speakers
Alan Snook – Renovating a 14-inch reflector
Martina McGovern – Orion and beyond: First Steps in Astrophotography.
Nick Hewitt – Variable Nebulae Update
Mazin Younis – In Search for Dark Skies
Prof. Michael Merrifield – Update on the Extremely Large TelescopeMore infö and booking details at https://britastro.org/event/deep-sky-section-annual-meeting-3
Price is £10.00 or £7.50 for BAA members and other concessions. Bookings open until 13th March. Price includes lunch and refreshments.
Much thanks goes to Bedford School and Bedford Astronomical Society for hosting this event.
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Its on YouTUbe now - see
Callum
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This Saturday afternoon is the BAA Deep Sky Section annual meeting, being held as a webinar, by Zoom and YouTube,
Programme is:
14:00 – Welcome
14:05 – Observing Clusters of Galaxies – Owen Brazell
14:55 – Fumbling in the Dark: Exploring the Deep-sky through Imaging – David Davies
15:45 – Deep Sky Section update – Callum Potter
16:15 – CloseAll welcome.
Full details at: https://britastro.org/node/26469
Hope to see you there...
Callum
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At this weeks BAA Wednesday Webinar Eric Walker will lead on "All Things All Sky". Wednesday 16th February at 19:00 GMT.
Eric is the chairman of the Highlands Astronomical Society, and operates his own back-garden observatory in the Scottish Highlands, the Beinn View Observatory.
All welcome - you can join by Zoom or view on YouTube.
For more details and links visit https://britastro.org/node/26428
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This months BAA Wednesday Webinar (15th Dec, 7pm), is Exoplanets – present and future, presented by Roger Dymock, Assistant Director for Exoplanets in the Asteroids and Remote Planets Section of the BAA. And yes, amateur astronomers can observe the presence of exoplanets.
It's all free - and for joining details etc. visit https://britastro.org/node/26443
And it will be available to replay after the live event on YouTube: https://www.youtube.com/user/britishastronomical
Where all the past webinars and other meetings can be viewed.Callum
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Partial eclipse from Orkney
in Imaging - Solar
Posted
After a nice sunny day, inevitably the cloud thickened in the evening to obscure much of the solar eclipse, except for a few frames. Here's the best, taken with Canon 600d and Canon 75-300 zoom at 300mm at around 20:09 BST . As seen on BBC Breakfast this morning.
Callum