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About jambouk

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  1. It seems it is possible to load a long video into winjupos, say 10 minutes of Jupiter, and it does something to the video before the user then stacks the video in AS!2. What does it do to the video to allow the stacking software to then use any frames it want from the 10 minute file to produce a sharp, “derotated” image? I can see how winjupos handles pre-stacked inages, wrapping and overlapping them around a globe of the planet, but unsure what it does with video. Thanks for any clarification. James
  2. I'm reading an interesting book, "Stargazers : the contribution of amateurs to astronomy" edited by Dunlop and Gerbaldi (1988) and one of the chapters, rather abstracts, outlines the author's criteria for differentiating professional astronomers, amateur astronomers and what he refers to as "recreational sky observers". It is only two pages long (these are transcripts of talks), and I've shown these below. It is an interesting philosophical topic, but by the definitions used, I am a recreational sky observer rather than an amateur astronomer. What are you? James
  3. jambouk

    Road to Modern Astrophotography

    Thanks Olly, I've just ordered a copy of that for myself. James
  4. I've been sourcing books to sell at the coming Spring Conference of the Society for the History of Astronomy, and have especially been looking for those relating to the history of astrophotography as Nik Szymanek is giving a talk titled "The Road to Modern Astrophotography" and I know there is much interest in the topic. It's been fun finding books and looking through them when they arrive. I'm also looking forward to the day and especially to Nik's talk. More information about the day can be found here: https://societyforthehistoryofastronomy.files.wordpress.com/2017/11/spring-conf-2018-poster.pdf James (SHA Librarian)
  5. jambouk

    Is it? Isn't it?

    I marked the points of the three larger moons, Io, Ganymede and Europa, and the centre of Jupiter from your screen shot of the planetarium software and made a layer which I placed over your capture; positioned everything so they roughly matched. The red dot in the square is where you have suggested you detected Amalthea, and the blue dot is where the planetarium software thinks Amalthea should be. They look pretty close. I suspect it is the moon. You should also pick several random sites around the planet, at the same distance, and equally stretch the data as much, and see if you also generate similar "moons" - it is relatively easy to think there is a relationship when you look hard enough for one. But I think this is Amalthea, but I am no expert. Nice one James
  6. Did a few more comparisons. The best was with DSS stacking over 300 very short unguided subs I'd taken 3 years ago and a load of darks; the new PC did it in 60 minutes, the old PC in 190 minutes. All processing was too quick in AS!3, only 20 seconds or so, but the new PC was 4x faster than the old one. So I'm content there is an improvement on this front. James
  7. I am using the same *.avi file to stack; is there a setting in Registax to alter how it decodes the video I feed it? James
  8. I've got a new desktop and it is hands down a higher spec than the 8 year old existing PC. I ran exactly the same planetary data through PIPP on both machines and the new PC is about 4 times quicker. But when comparing aligning and stacking in Registax 6 of the same data, there is no difference, and if anything the old PC may be slightly quicker... Why is this? James
  9. Annual Meeting 2018 The date is Saturday the 2nd of June 2018 at our normal venue: the Institute of Astronomy in Cambridge. There's no need to book in advance. Member or not, you're all welcome to turn up on the day. https://www.webbdeepsky.com/annual-meeting/
  10. South West Astronomy Fair - 11th August 2018 9:30 - 5:30 http://www.southwestastrofair.com/
  11. Festival 2018 is the 7th of July at The Heath Conference Centre in Runcorn Cheshire http://nwastrofest.co.uk/
  12. Now the quiz has happened, can we get to have a go on here? James
  13. jambouk

    Stargazing Live 2018

    It is a shame the event isn't happening this year. I think it is a useful event in the annual calendar to get the general public interested. It needn't be a vastly expensive venture. Shame. James
  14. I'll be there. I need to learn more about the Deep Sky. Looking forward to it. James
  15. jambouk

    IAS 2018 Any date yet?

    I've just emailed Martin to ask when the date will be released. I'll feedback. James

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