Alex Pratt

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  • in reply to: Falcon 9 upper stage re-entry this morning #628204
    Alex Pratt
    Participant

    I captured it on a couple of my south-facing video meteor cameras – UK000J (RMS) and Leeds_SE (UFO). The composite still image is from Leeds_SE and its 20s video can be viewed at this link:

    https://www.youtube.com/watch?v=2l6sqzoyORg

    From my location it travelled from R to L.

    Alex.

    in reply to: Falcon 9 upper stage re-entry this morning #628182
    Alex Pratt
    Participant

    Very nice video.

    I wonder how an insurance claim would go against Space-x?

    or lodge a claim with DOGE (Department of Geophysical Events)

    in reply to: Storm Dunlop #628140
    Alex Pratt
    Participant

    Storm’s cousin, Janice Cowan, sends the following note:

    Is there anyone from the BAA who would like to say a few words that intends to attend please? I am finalising organisation by the end of this week Friday 21st Feb.

    Please let her know if you’re planning to attend. Janice’s contact details are available from the BAA Office or send me a PM.

    Alex.

    in reply to: DSLR video resolution #628133
    Alex Pratt
    Participant

    Hi James,

    Another method of lunar imaging with a DSLR is to take a series of still images and stack them. In this example from 2011 I used my venerable Canon EOS 500D to take 19 images of the Aristarchus region and stacked them in RegiStax. The large 14-bit(?) well depth of a DSLR allows you to capture the subtle tonal changes across the lunar maria.

    Alex.

    Alex Pratt
    Participant

    Wonderful to see this photographic record before the jet age and commercialised eclipse tours. Travellers dressed in their finery during the long adventure, rather than in today’s casual wear.
    I say chaps, how about playing quoits at the Winchester Weekend or the Christmas Meeting? 1900s dress code not obligatory.

    in reply to: Storm Dunlop #628044
    Alex Pratt
    Participant

    Richard Austin has set up a fundraising page in memory of Storm:

    With a little over two weeks to go until Storm’s funeral, I wanted to let you know that I have set up a fundraising page in his memory, with the proceeds to go to the Celia Cross Greyhound Trust.

    https://www.gofundme.com/f/remembering-richard-storm-dunlop

    As you are probably aware, along with astronomy and meteorology, Storm’s other passion in life was his greyhounds. Storm has known the Celia Cross Greyhound Trust for many years, and they were fantastically supportive after his life changed during 2024, taking in both Roxy and Vinny at short notice.

    In related news, and should you wish to do so, to advise you that any flowers brought, or sent, to the funeral itself have to be sustainable, i.e. only natural materials that are biodegradable.

    in reply to: John Goodricke #628038
    Alex Pratt
    Participant

    A very nice presentation summarising his life and work.

    Photo of the earlier Goodricke plaque and a link to a biography of him:

    https://britastro.org/observations/observation.php?id=20100824_130000_a44814b03cd02547

    https://britastro.org/observations/observation.php?id=20100824_130000_f9ed88722744aac8

    The new Goodricke plaque and a link to the story of its unveiling and a video (with signing):

    https://britastro.org/observations/observation.php?id=20220330_124028_a03ee3e6147ccfe5

    Alex.

    • This reply was modified 1 week, 6 days ago by Alex Pratt.
    • This reply was modified 1 week, 6 days ago by Alex Pratt.
    in reply to: Storm Dunlop #628003
    Alex Pratt
    Participant

    David,

    I have sent you contact details for Janice Cowan (cousin) and Richard Austin (friend) via the Contact, PM facility.

    Best regards,

    Alex.

    in reply to: Storm Dunlop #627945
    Alex Pratt
    Participant

    Storm’s cousin, Janice Cowan, provided more details:

    Storm’s wishes for a woodland burial reflect his deep connection to nature, a theme woven throughout his life’s work. His informal funeral will be held at 1pm on Friday 28th February 2025, at the Sustainability Centre Natural Burial Ground, Droxford Rd, Petersfield GU32 1HR.

    Attendees are encouraged to wear warm clothing, sturdy shoes, and lap blankets are recommended, as the service will be held in the woods. Transport from the car park to the graveside, for anyone unsteady on their feet, will be available. In this way, we will be honouring Storm’s request for a peaceful natural final resting place in harmony with the nature and environment he cherished so dearly. Please would you let me know if you are able to attend and can join us as we are catering afterwards.

    (We can provide you with Janice Cowan’s contact details).

    in reply to: Storm Dunlop #627884
    Alex Pratt
    Participant

    Storm’s Funeral

    Maddy (BAA Office) kindly provides the following information:

    Janice Cowan, Storm Dunlop’s cousin has phoned us about his funeral arrangements. She has asked if anybody would like to say a few words at the funeral please? (She said there is no requirement to do so though).

    It will be held on Friday 28th February am (time to follow).

    The address is Petersfield Natural Burial Site:

    South Downs Natural Burial Site

    The Sustainability Centre
    Droxford Road
    East Meon
    Petersfield
    Hampshire
    GU32 1HR

    (if you are attending please let us know. We can provide you with Janice Cowan’s contact details).
    Alex.

    in reply to: Preparing for the eruption of T CrB #627761
    Alex Pratt
    Participant

    Jeremy,

    It was very pleasing that Michael and his family could attend the meeting on Saturday, and I saw how much they enjoyed your presentation – ‘British Independent Discoveries of the 1946 Eruption of T Coronae Borealis’.

    Alex.

    in reply to: Lunar occultation of the Pleiades Jan10.1 #627544
    Alex Pratt
    Participant

    I recorded 8 events last night. Temp was -6C and everything worked fairly well except that the seeing wasn’t good, especially when the Moon was at low elevation over neighbours’ rooftops.

    Running at 100 fps I didn’t detect any steps in the DD of Merope, Alcyone or Pleione, but Atlas displayed one of about 0.08s (attached). The Occult prediction gave details of Atlas’ multiple nature. Mag 3.6 Atlas has components Aa of mag 3.8 and Ab of mag 6.8, separation 0.22″, predicted step duration of 0.12s. It looks like Ab was occulted first.

    Tim – this weekend I’ll run it through Limovie and prepare a double star report and work through the other events.

    Great to get a clear night for M45 – but please arrange it for warmer weather next time. 🙂

    Alex.

    in reply to: Lunar occultation of the Pleiades Jan10.1 #627528
    Alex Pratt
    Participant

    Hi Tim,

    I have similar from my Alpine jaunts, just don’t wear them in the observatory to avoid perforating the cushion floor. I don’t think I’ll need the ice axe, unless it’s to prise open the door.

    This cold air brings lower humidity, 80%+ instead of 90%+. Windchill from the breeze though. 🙁

    Alex.

    in reply to: Lunar occultation of the Pleiades Jan10.1 #627526
    Alex Pratt
    Participant

    Thanks Tim,

    I hope to record some of the events as long as I and my observatory don’t seize up. The garden is sheet ice and snow compacted into concrete. Every time I unjam the door it freezes up again, the roll-off roof is in a similar state – and my dew shield has decided to fall apart.

    What could go wrong…? 🙂

    Alex.

    in reply to: Moon occults Saturn on 2025 January 4 #627396
    Alex Pratt
    Participant

    Congratulations, Lars!

    in reply to: Betelgeuse #627248
    Alex Pratt
    Participant

    Leona-Betelgeuse occultation – 2023 Dec 12 – pro-am campaign update

    Lead scientist Dr Miguel Montargès (LESIA – Observatoire de Paris) advises all contributing observers that the analysis of circa 100 light curves is proving to be an extremely complex process. They ask all observers and researchers to be patient during this work and Miguel gives us the encouraging words that the campaign’s results will be published in two (or perhaps even three) papers.

    Alex.

    in reply to: Fed up with cloudy nights try this #627090
    Alex Pratt
    Participant

    Be careful Bill, you’ll now be headhunted by GCHQ 🙂

    Alex.

    in reply to: Leonid meteor shower #626590
    Alex Pratt
    Participant

    Nov 17/18 waw clouded out here until 03 UT, then the bright Moon and hazy sky restricted my south-facing cameras. They captured up to 5 Leonids per camera; my north-facing cameras got twice that number. In conditions like that, the UFO cameras outperform the RMS ones.
    Nov 16/17 had variable cloud and recorded even fewer meteors.

    As well as Leonids, the sigma Hydrids were active, the trickle of Northern Taurids continued and a few alpha Monocerotids were detected. A clear sky (and without the blazing Moon) would have been quite productive.

    Alex.

    in reply to: Comet imaging help – C/2023 A3 #626155
    Alex Pratt
    Participant

    9. I suspect a DSLR is just not as “good” as a dedicated astrophotography CMOS camera.

    James,

    A DSLR can be used to get very good widefield images of comets, whole disc images of the Sun and Moon, and details of sunspots and lunar features. Your DSLR has a full-frame 14-bit sensor which can record a greater tonal range than a 10-bit sensor such as used in the Seestar S50, for example.

    I have some dedicated planetary imaging cameras yet it’s still fun to attach a DSLR to a ‘scope and get some nice ‘large frame’ lunar vistas.

    Alex.

    in reply to: Comet imaging help – C/2023 A3 #626118
    Alex Pratt
    Participant

    Hi James,

    Not a detailed workflow, rather the key steps to enable DSS to stack comet images. See Nick Haigh’s advice here:

    https://www.simplelists.com/baa-comet/msg/25949574/

    Alex.

Viewing 20 posts - 1 through 20 (of 322 total)