Alex Pratt

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Viewing 20 posts - 181 through 200 (of 336 total)
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  • in reply to: BAA AGM & Meeting. #584716
    Alex Pratt
    Participant

    Hi Nick,

    Nice one!

    Cheers,

    Alex.

    in reply to: BAA AGM & Meeting. #584714
    Alex Pratt
    Participant

    About 1/3rd of Leeds’ citizens are wearing facemasks on public transport and in shops. I recently had a mini-break in Liverpool, travelled by coach and I was the only passenger wearing a mask. I made my choice; other passengers made theirs. I don’t mind wearing a mask at the AGM.

    I hope the IoP won’t be directing spotlights at the audience and view screens as done previously. We’ve been spoilt by meetings on Zoom and YouTube, seeing the speakers’ excellent slides in all their glory, instead of squinting through the Bortle 9+ glare of the brightly lit lecture theatre trying to glimpse the washed out screens. Heaven help a speaker who shows a deep sky image. Please switch off the spotlights and dim the theatre lighting during presentations.

    Cheers,

    Alex.

    in reply to: Tatton Park meteorite #584664
    Alex Pratt
    Participant

    Hi Nick,

    So if Betelgeuse ever goes bang we’ll have to look out for alpha Orionid meteorites…   ðŸ™‚

    Alex.

    in reply to: Southampton #584656
    Alex Pratt
    Participant

    Hi Daryl,

    Have a look at

    Huge fireball over the Channel on Sept. 5 | IMO

    Cheers,

    Alex.

    in reply to: Ticket to ride! #584575
    Alex Pratt
    Participant

    Perhaps regular VG customers could get a frequent flyer discount…

    in reply to: Mirror re-coating #584468
    Alex Pratt
    Participant

    Good suggestion. Along that line, have a look at:

    https://britastro.org/sites/default/files/10-KONRAD_a%20portable%202016.pdf

    and results from its use: (11 MB PDF)

    https://www.iota-es.de/JOA/joa2017_2.pdf

    Cheers,

    Alex.

    in reply to: Dealing with dew #584449
    Alex Pratt
    Participant

    Hi Tim,

    I have one of these heater bands around the collar of the corrector plate of my C11

    RVO Heater Bands With Integrated Controller – Rother Valley Optics Ltd

    and a dew shield (made from a black foam exercise mat) over the heater band and ‘scope tube.

    Apart from a few nights during our glorious summer, the heater band is switched on before an observing session and kept running until close of play. No more misty optics…

    Cheers,

    Alex.

    in reply to: Scotty? #584377
    Alex Pratt
    Participant

    Thanks Daryl,

    The photo is now kept inside my copy of Deep-Sky Wonders (from Melvyn’s library). It would be interesting to hear if any VSS members met Scotty at the 1990 meeting.

    Clear skies,

    Alex.

    in reply to: Starlink Flares? #584299
    Alex Pratt
    Participant

    Hi Mike,

    I’ve been getting these on my video meteor cameras, just as you describe – a series of satellite flares from the same location in the sky. To be honest, I haven’t checked their identity, whether Starlink or otherwise (e.g. on Heavens Above). These flares, and the processions of satellite chains, are becoming so common I often delete the video clips, although I have saved a couple for presentation purposes.

    Oh the joys of the modern Vermin of the Skies.

    Cheers,

    Alex 

    in reply to: 2021 April Lyrids #584121
    Alex Pratt
    Participant

    Hi Bill,

    Thanks to data from NEMETODE members David Anderson (Dunure), Denis Buczynski (Tarbatness) and William Stewart (Ravensmoor) we can confirm the following: Its ground track

    showing it travelled approximately S to N, descending from 97 km altitude to 66 km. It had an absolute mag. of about -3.

    Its radiant was at RA 13h 34m, Dec 5.1, amongst the Virginid / antihelion source. Its Vg was slow, ~18.5 km/s – confirming your assessment!

    We have a Q3-quality solar system orbit which is very similar to the alpha Virginid (AVB) stream.

    Cheers,

         Alex.

    in reply to: Fontana Translation Peter Fay Sally Beaumont #584119
    Alex Pratt
    Participant

    Hi Denis,

    Sally was on my trip to see the 2002 total solar eclipse from Australia’s Nullarbor Plain. She was accompanied by her son. We had wide-ranging chats on various topics, from visual observing to German pronouns…

    If I remember correctly, her father wanted her to have a good education, she went to the best schools and she studied the classics. A lady who was so talented and always modest.

    Alex.

    in reply to: Booming sounds across Dorset, Somerset, and Devon #583982
    Alex Pratt
    Participant

    Here’s the Sat24 image from 15:00 UT yesterday which shows the cloud cover that masked views of the fireball from southern England

    Cheers,

         Alex.

    in reply to: Booming sounds across Dorset, Somerset, and Devon #583978
    Alex Pratt
    Participant

    Hi Richard,

    Here’s its IMO Fireball Event webpage

    Fireball event (imo.net)

    but almost all observers don’t mention any sound. Is it the same event?

    NEMETODE members didn’t detect it on radio, but more checks awaited…

    Cheers,

         Alex.

    in reply to: Ron Livesey #583749
    Alex Pratt
    Participant

    This is very sad news. I met Ron on numerous occasions and he delighted in explaining the aurora, discussing solar observing and monitoring variable stars, mentioning his well-travelled career as a civil engineer – and his distrust of computers!    🙂

    He felt that an engineer should be able to solve problems by working from first principles and their professional training, rather than relying on the integrity of a computer program. This philosophy meant that he didn’t use e-mail, but it was nice to receive letters from him.

    Here’s a link to his article on the ‘Jam-Jar Magnetometer’

    He liked drawing and always had a sketchbook to hand. I’m proud that I have one of his watercolours of Holyrood Palace and Calton Hill, Edinburgh.

    With the passing of Ron and Dr Dave Gavine we have lost, within a year, two of Scotland’s great contributors to British amateur astronomy.

    in reply to: Ursids #583611
    Alex Pratt
    Participant

    Hi Bill,

    Great to see your spectrum of this Ursid. We measured its Vg to be 33.6 km/s (medium speed) and the IAU MDC lists the Ursids’ parent to be comet 8P/Tuttle – why does that remind me of Benny Hill?   ðŸ™‚

    It’s a Jupiter-family comet with a period of 13 years. Well worth reading up about this interesting comet which can make relatively close approaches to Earth.

    I’ll check if we got multi-station captures at the times you’ve listed and I’ll reply offline.

    Cheers,

         Alex.

    in reply to: Ursids #583606
    Alex Pratt
    Participant

    Hi Bill,

    I look forward to seeing your processed spectrum.

    David Anderson and I recorded 5 other multi-station Ursids across Scotland last night, so they might be matches for your other spectra. The predictions of enhanced Ursid rates came true in the early hours.

         Alex.

    in reply to: European Space-Ody #583596
    Alex Pratt
    Participant

    Great to see Matt Taylor in there…    🙂

    in reply to: Geminids 2020 #583559
    Alex Pratt
    Participant

    Hi Bill,

    I caught that meteor on my Leeds_N camera and it confirms it was a Geminid (apparent mag. 0.5 from here).

    The fainter trail above it was a mag. 2 December alpha Draconid which appeared 2.5 s later.

    The weather has cooperated better than expected and my cameras have recorded hundreds of Geminids – keeping me busy.

    Clear skies,

          Alex.

    in reply to: Update to member pages #583540
    Alex Pratt
    Participant

    Hi Dominic,

    Many thanks for your work on this significant project and for looking at all the issues raised.

    I’m happy to just move forward with new Album entries having correct timestamps and not worry about past entries. They’re for presentation purposes only and the work submitted to Sections will be logged with the correct dates and times.

    Cheers,

         Alex.

    in reply to: Update to member pages #583533
    Alex Pratt
    Participant

    Hi Dominic,

    I’ve just added a couple of images taken in September. I always enter my times as UTC, e.g. 2020 Sep 13 23:13:22 but it is listed as Observed 2020 Sep 14 00:13 UTC. That pesky BST !

    The ‘Technical details and background story’ window doesn’t have a spell checker. Could this be enabled?

    Thanks,

         Alex.

Viewing 20 posts - 181 through 200 (of 336 total)