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johnfosteruk

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Everything posted by johnfosteruk

  1. Outstanding image, how many frames did you stack?
  2. This is compiled from a quick batch of data captured using two of Slooh's rigs on El Teide. The gear used was an 85mm Televue Refractor + SBIG ST-10XME and their 432mm Corrected Dall-Kirkham + FLI PL16803. From each rig I had 3x40s L and 3x20s R, G & B. So that's 6 minutes total exposure. I plan to capture lots more data, reprocess and compare.
  3. Wonderful to see her receiving recognition, and wonderful to see such a selfless donation for the betterment of humanity. Bravo indeed.
  4. Looks like where the side of the bit has caught it to me.
  5. This 370x820 metre asteroid was expected to reach closest approach to us at 4.7 million km on 3 Sept, at 10:09UT, reaching magnitude 14.9. By the time I got around to scheduling Slooh's 17" telescope to try and track it, there were no slots available at that time so I scheduled 12 captures for the 2nd instead. The asteroid was at mag 15.3 at 20:51UT when this frame was captured, and as it's shifting at a fair pace I didn't catch it in any of the other frames, having not thought about the FOV!. But I think I've confirmed it via a few sources. Despite what the daily fail would have you believe it posed no threat to the residents of Planet Earth
  6. Seriously something wrong And you're absolutely correct of course, but gradientxterminator is a fair compromise if the OP uses Photoshop.
  7. Olly... recommending PI... what’s going on? I’m confused.
  8. This is just for fun more than anything. Somebody in another dark corner of the web suggested he thought the tail might be curved. So I stretched the living daylights out of the comet luminance layer (the result of aligning on the comet and stacking with kappa-sigma) I've overlaid what I think is the curvature.
  9. Thanks Paul and Dave. For fun I stacked the 15 subs twice, once for the stars, and again for the comet. A bit of processing and then combined them in Photoshop. There will be a V2 in due course as this has flaws, but it's a start.
  10. Very nice Gus. I think I'll get the binoculars out for a look at this again, it's been a while.
  11. I've recently signed up to the Slooh.com astronomer package and while you don't have the control and the option to capture any really long subs that you get with iTelescope, you do have potentially 20 hours per day imaging time, unlimited 'missions' (slots) and they've got some pretty decent gear. Their big scope on El Teide doesn't do well in the wind, so you lose a fair amount of subs but what you do get out of it is pretty good. For 20 quid a month you can't go wrong. While I'm waiting for the big scope to provide some data for a project I'm working on I decided to fill in with this one captured on one of their other rigs. It's 23 mins in 15x50s subs with their 11" Rowe Ackerman Schmidt Astrograph, details below. I did 3 versions - colour, mono and inverted. I stretched the mono and invert a fair bit more than the colour for tail detail. There's vignetting and flicker but for single subs I'm pretty happy. I might run this again and stack pairs to give me a little more processing leeway. Telescope Manufacturer: Celestron Effective Aperture: 279mm (11") Focal Length: 620mm Native Focal Ratio: f/2.22 Camera Manufacturer: Celestron Camera Model: Nightscape 8300 Colour Image Horiz FOV (Arcmin): 99 Image Vert FOV (Arcmin): 75 Image Resolution: 3326x2504
  12. Thanks Fozzie, I hope it stays clear for you tonight.
  13. After I grabbed a shot of the moon rising last night it remained clear. So I had a few hours observing Mars and Saturn, then onto some doubles before getting ready to do some proper imaging. Here's a few, lots more to process. Wide Close Closer
  14. We had two westies, Lucy was my companion at the scope, Hamish was my nemesis at the scope I say had, some of you will recall we lost Hamish last year. Lucy unfortunately made her last visit to the vet yesterday aged 16yo and 1 day. A touch raw to be sorting photos to post, maybe later but don't let that derail the thread! She had a good life though and we've spent the last day recalling funny stories, there are many. We had a bbq once and a bottle of beer got dropped, the explosion was spectacular and you've guessed it, Lucy (we hadn't got Hamish yet) was there like a shot to clean up, regardless of the broken glass. You've got to watch them! She had a cast iron constitution, she was partial to a good curry and you had to watch your cappuccino too!
  15. Thanks for the heads up Andrew. I'm hoping it brightens to naked eye as predicted.
  16. A quick single frame capture at 200mm with the moon not much above the horozon at 5 degrees. No adjustments to colour, this is the naked eye view, which is rather lovely I feel. No work tomorrow and a clear sky means proper images later.
  17. I saw that. I liked his little Dutch boy comment!
  18. That relies completely (for at least a little while longer) on Russia for crew transportation.
  19. Dear Liza... Actually it's in the Soyuz orbit module (which isn't involved in the descent so that's fine) and it's 2mm diameter. Alexander Gerst plugged it with his thumb at first, then tape while a permanent solution was sought. The internet at large is talking lots of rubbish about it of course Here's a write up. http://www.astronomy.com/news/2018/08/international-space-station-losing-air-through-a-tiny-hole-astronauts-safe
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