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Stu Todd

Members
  • Content Count

    75
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  • Last visited

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51 Excellent

About Stu Todd

  • Rank
    Nebula

Profile Information

  • Gender
    Male
  • Interests
    Pies, Beer, Spectroscopy and Pies ( not necessarily in that order)
  • Location
    New Zealand
  1. You could make your own for next to nothing - http://www.deepskywatch.com/Articles/make-bahtinov-mask.html
  2. You're doing Gods work @RadekK, you have made so many astronomers pleased, but there must be those who can't think for themselves also
  3. No, fair enough, it was more of an example of why there is a need to take multiple images, regardless of your level. Hope you find some bright ones to practise on. Stu
  4. I think in order to have your discovery verifiable by the MPC etc, you will need to submit images and precise astrometry of your object. Also, blinking different images is how nova outbursts, supernovae etc are discovered, so, you really need to take images. This isn't difficult however. Stu
  5. Ken has a good method but if you want to analyse and "blink" images to discover quickly moving objects, I have seen good results with Astrometrica - http://www.astrometrica.at/ It is quite old so have a look to see if you can get it to work on your Mac. Stu
  6. Your mirror making will benefit from a Ronchi tester, and learning the patterns different shaped mirror faults produce. A cheap and simple Ronchi knife edge tester would be a good place to begin. Have a look at https://stellafane.org/tm/atm/test/ronchigrams.html, plenty of info there. Stu
  7. Yes, that Teflon cycle grease is perfect. I use TF2 on my EQ6s. Stu
  8. Fantastic Andrew and Jeremy ( a bit jealous the late, great PM signed yours)! Digging through the cupboards at my old clubhouse, I remember the Becvar volumes, plus another similar. Am I right in thinking these were basically coloured dots representing the star positions, with little else? I will try digging one out when a vaccine comes along to save us all. Stu
  9. Great info, much appreciated Ken! I guess that $30 in 1965 was a fair amount of money? I didn't know there was a companion to the LMC atlas, that would be nice. Cheers, Stu
  10. I'd like to share 3 of my atlas with you, and would like more info on the first two, if anyone has more info on them. This first one is a 1967 Smithsonian Press published photographic chart of the LMC giving position and details of variables and many NGC objects, and catalogues of clusters I haven't heard of before! The second atlas is the Stellarium, this is in a folder but there is no date anywhere to be seen. I'm guessing it is of the same era as the LMC chart? I also have the 1969 SAO catalogue. Any further knowledge on these, original availability and cost etc greatly welcome. Thanks for looking, Stu
  11. A quick google search came up with: https://lee-phillips.org/skymap/ https://virtualsky.lco.global/ https://aladin.u-strasbg.fr/AladinLite/doc/tutorials/interactive-finding-chart/ Stu
  12. Ah I see what you're getting at. Does this link help with the maths? http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?bibcode=2000JIMO...28..176O&db_key=AST&page_ind=0&data_type=GIF&type=SCREEN_VIEW&classic=YES Stu
  13. I'd like to help but "longitude" is relevant to Earth co-ordinates? The Julian Date is easily found, you mean the RA of the Sun for a given JD? Suncalc.org is a great page, doesn't give JD but you can set the actual Z. Hope that helps. Stu
  14. So ask a seemilngly simple question, and get 10 different answers OP. It really does depend on what you are doing. If you're going all faint and fuzzy, get Astroart or Prism etc, process with Pixinsight and climb that learning wall. Planetary, then, as Vlaiv says, go Autostakkert to stack the .avi and Registax to perform wavelet magic on those results. GIMP is an awesome free (as good as Photoshop) imaging software to polish your images. In all honesty, NINA has ben pushed around lots but I've had nothing but badness from it, use SharpCap. As an aside, I'd recommend the Steve Richards book "Making Every Photon Count" to help with the small stuff - https://www.amazon.com/Making-Every-Photon-Count-Astro-Photography/dp/B00J5PL6JK.
  15. Have a look at Prism at https://www.hyperion-astronomy.com/pages/prism-landing They did do an 80 day trial period. The Lite version is $149 but goes on sale sometimes for $99.
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