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Radar last won the day on November 20

Radar had the most liked content!

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417 Excellent


About Radar

  • Rank
    Termination Shock
  • Birthday 02/27/1973


  • Biography
    Astrophotographer Extraordinaire
  • Location
    Perth, Western Australia
  • Interests
    Take a Guess?
  • Occupation
    Working in Spectra Physics BioTechnology
  • Astronomy Equipment
    C14 XLT with Peltier Cooling, QSI 683-wsg, Astrophysics 1600GTO, Sirius Observatory, Solarmax 90 DSII BF30. Optec Rotator

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Profile Information

  • Gender
  • Location
    Western Australia
  • Interests
    Astronomy, Physics, Heavy Metal, MMA, Science, Intelligent TV Shows, Logical Thinking People
  1. Railway Viaduct Time Lapse

    Awesome mate. I've been doing some of this down here. At least with time lapse cloud is a bonus. We are getting so much moisture from the Indian Ocean these days I'm struggling to get proper observatory time. Time lapse is on my cards now. Ray
  2. The Pier Expansion

    Might have to design with a material that hardly expands. Not sure what the Invar cost will be, but I'll do some digging. Ray
  3. Moonlight under the arches

    Awesome Gordon. Great spot you have there. Ray
  4. The Pier Expansion

    Turning the air conditioner off has the opposite effect, almost instantaneously. Very surprised how easily the pier loses PA with temperature. Ray
  5. The Pier Expansion

    Check this screenshot out. I'd polar aligned and was getting great alignment. I turn on the air conditioner inside my observatory to get the camera down to minus 20 and the PA plot goes crazy. This tells me that I either need to ensure the inside of the observatory is always at the same temperature (pretty hard to do in Australia during summer) or that I need to cool down the pier to a specific temp whenever I perform PA. In the plot below, where the graph begins to go up, that is the moment I turned on my air conditioner. I had no idea my pier was so temperamental. Ideas on how to solve this welcome. Ray
  6. Very nice mate. Wish I had some countryside around me like that. I think timelapse could be a good distraction for me when its cloudy. Ray
  7. The Impossible Image

    Cheers Prof. I don't guide in dec at all usually. But I'm also thinking that at the counterweight down position, that the mount has no pressure either side of the worm and possibly is free wheeling a little. Soon as this cirrus clears I'll try the above. Ray
  8. The Impossible Image

    I'll try this Greg and let you know how I go. Always something to learn in this craft. Excellent idea as well. I'll certainly try this. Ray
  9. The Impossible Image

    The guidescope guides beautifully 99% of the time. When we are guiding on the Tarantula, the Tarantula is sitting right on top of the SCP, meaning the main scope and guide scope are directly above and below each other with the counterweight bar pointing straight down, which makes me think it wouldn't need to flex at all, however Greg, stranger things have happened so I'll double check this and see if something is loose. Could be the camera or dovetail plate, who knows. Thanks for the tip, certainly worth looking into. Ray
  10. The Impossible Image

    Yes, I might install a solid pier about 1/2 the length of the lifting column and put the lifting column on that. This way I can still use the column but only at half mast. I believe it is only when I come close to fully extending the column that it shifts slightly (maybe 1mm). But at 4000mm times 7000 light years, that's a massive error. Ray
  11. The Impossible Image

    This is worth writing about. I've got this one object in my southern sky that just eludes perfect tracking. It is the Tarantula Nebula. Knowing how illusive this object is for my mount (for whatever reason) I polar align earlier tonight on the Northern Horizon, then the East. Using the tracking graph and 20 years of experience I can tell you that my PA is incredibly good. But I also know that my pier has some slight flexure (probably because I use a lifting column). Anyway, as predicted my perfect PA did not translate to the Tarantula (this specific region of sky). My mount, telescope and counterweights hovers about 180kgs, so flexure is certainly possible. So tonight, I decide to do PA on the Tarantula itself, until there is no drift. I perform this with the tracking graph as well to ensure I've got no drift. Once I had no drift via the graph or tracking image, I refocus the equipment, guide, and start imaging. Guess what? First sub shows drift. I still have some theories on what could be causing this but its pretty annoying. Any other area of the sky has pristine PA and never drifts. This one object is cursed. I'm actually enjoying the challenge. Suggestions and conspiracy theories are of course welcome. Ray
  12. So It Begins!

    I couldn't agree more mate, I am still using Windows 7 across all my PC's. They aren't perfect either, but with the amount of programs and products I control I'm sticking with "if it ain't broken, don't fix it". Ray
  13. So It Begins!

    I dunno if I like the idea of a satellite defence system actually being called Skynet. Ray
  14. So It Begins!

    That's actually quite a good resemblance. We've got a vacuum cleaner that cruises around the house everyday and our phones appear to always be listening to our words. If I say something similar to 'serious', Siri always pops into action asking what I need. One or two more decades before we're all wiped out. Sarah Connor! Ray
  15. Red Sun

    Crazy Prof. I saw this on the news. Would have been an awesome site. Ray