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Malpi12

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Posts posted by Malpi12

  1. 23 minutes ago, tooth_dr said:

     Is it possible to see this as a dot moving across the sky like a satellite ?

    The rocket launch is far enough from land such that quote" ,, the blast zone, in the event of catastrophic failure, poses no risk to people or property ,,,"  last night on telly! Also shown was one of the  ( 9 ? ) mini-sats being one-hand held so even with its small solar panels extended it (they?) is probably  going to be dim. 

    I have not got the dimensions of Prospero to hand but I think it was a lot bigger than this (these) and the rocket was very big !

    • Like 1
  2. 5 hours ago, DaveL59 said:

    well it is our first launch into space proper...

    Ummm, not really !
    Our first proper British rocket (Black Arrow*) launched satellite was the British made Prospero.
    Launched from a rather large aircraft carrier floating in the south Pacific,,, called Australia :) 
    And it was placed well high enough that it is still up there !

    * part of the Black Knight / Blue Streak experiments  of the 1960/70s  (violins) - I remember it well and still curse HaroldW et al. for cancelling the things (end violins)
     

    • Like 1
  3. 3 hours ago, Ratlet said:

    should have tried paring them top to tail!

    Ah! Thus creating an entangled pair !!

    I used to think my wife was a witch because she could always find me a matching pair (accompanied by a "withering look" ) where I had previously failed miserably. Now I realise the look was that of a trained quantum physicist correctly observing the heap and thus collapsing the wave functions.

    Always have plenty of freshly washed and dried wool socks that, at each session,  two  (see what I did there - avoided "pair") can be placed on each foot with wide shoes or boots.

    • Haha 1
  4. 11 hours ago, symmetal said:

    likely sag with the weight

    When I first had the thought my concern was how to support/attach the vanes without resort to drilling holes for bolts !!  If 3d circles could be printed that is good - could the vanes be made of stiff material (conventional metal) and be included in the 3d plastic ? Perhaps like rebar.

    No one (I imagine !) would want to take apart a rasa just for this, but here we have an interesting possibility, I am sure the rasa will get over the insult to its dignity when the new corrector arrives !

     

    12 hours ago, Louis D said:

    I'm not sure how much the camera corrector lenses would help with the SA

    Yes, exactly, and without needing to bend the sensor like we did with film in days of yore 🤣  One would think that SA was still easier to correct in a large dia. front optical. But who knows ?! with modern tech and clever design ?  There was a time when manufacturing tech needed correctors matched to their primaries, but now I read that machine tolerances are good enough that that it is not needed any more. A bit like the change in threads from in-house specials to Whitworth :)

     

  5. 4 hours ago, imakebeer said:

    Sequator ,,,and Siril

    I agree Sequator is easy to get going, but (when I used it some time ago, things may have changed) it was not obvious at first that it was rejecting -and not giving a reason why- a lot of my subs. but DSS took them happily.
    Siril has defeated me thus far ! probably because of not putting in enough effort since DSS is doing ok

    PS I make beer as well :)
     

    • Like 1
  6.  

    Andromeda always steals the lime-light don't you think ? 😀  So here, for a fun extra, you also have got :-
    M 52,  Cassiopea Salt & Pepper Cluster, and
    NGC 7789,  Caroline's Rose Cluster !
    Extra.thumb.jpg.1c15b7b3c845a444974dfe20855112cb.jpg

    1 hour ago, wesdon1 said:

    I have saved the raw files of my image

    Very wise ! and I also keep the DSS autosave.tif and do all processing on it in Gimp.

    • Thanks 1
  7. 5 hours ago, wesdon1 said:

    struggled endlessly trying to get Deep Sky Stacker processing software to work for me

    software like GIMP,

    Well done, nice one !
    Congratulations on getting there in the end :) We've all been there, pulling hair out and muttering expletives over software. Took me ages to get DSS and Gimp sorted.

    Always good to get an unexpected bonus in another part of the frame, I discovered Andromeda in a similar way, using my Canon 60D with vintage prime lenses on fixed tripod.

    Thanks for showing and as  Carastro says, flats are good :)
    However, dont worry, all is not lost for this one, you can construct an artificial flat with Gimp. I hope you dont mind but I have taken the liberty of a quick play with it just to 'whet you appetite' to get Gimp installed :) 

    Using a thing in "Filters"  called a "Gaussian blur" make an extra layer  and subtract it from the base image. (edit later :  I can expand details if/when you get into gimp !)

    There are always edge effects to be cropped out but in this case we would lose Andromeda so I have left them in ! 
    The experts could do a lot with it.
     

    Reasult_wes1.thumb.jpg.825ed0bced393658473b0163bd39065e.jpg

     

    The flat

    Flat_wes2.thumb.jpg.b0450315a27520b0e3cd96a7e697f72f.jpg

    • Like 1
    • Thanks 1
  8. Apologies for not updating this topic earlier - every time I was about to update I got a few more lucky breaks in the clouds and  more obs to process !
    Anyway here we go with Oct and Nov additions to nicely fill in the gaps in the Sep lot.

    Of particular interest is the 26 Sep (green) obs half way down the decline that seemed displaced from the other greens in the slope. I thought at the time it was a rogue or my bad, but a month later (30 Oct, pink) suggested it was a real bump. 4 (blue) in Nov confirm the wiggle !

    A google on "bump cepheid"  is quite interesting.

    En.thumb.jpg.c6642daf9a7f042805803cd1a06059d3.jpg

    • Like 3
  9. 4 hours ago, Elp said:

    It's also a good way of quickly going through a set and getting rid of ones which may have clouds in them.

    Ah! good idea, I must remember that ! Previously I roughly pick, then do somewhere between 90% and 50% depending on condx 

     

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