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lukebl

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lukebl last won the day on August 3 2019

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About lukebl

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    Red Dwarf

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  • Gender
    Male
  • Interests
    Norfolk Astronomer, bread-maker, bug and wine enthusiast. Come to Attleborough. At least it's not Watton.
  • Location
    Central Norfolk-ish somewhere, UK, 52°N 1°E ish

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  1. Well, whatever to do, I'd like to book my place with you! I was lucky enough to be able to travel to Casper, Wyoming, for the 2017 eclipse. The weather was perfect, and I can't wait to see another one. Hopefully the covid crisis will be over, and I'm still alive!
  2. What with the latest successful landing on Mars, I was thinking about the excitement about the discovery of Methane in the Martian atmosphere and it being a possible indicator of organic life. Could someone explain why that’s so exciting when the outer planets are full of the stuff and no-one’s suggesting that, say, Neptune’s methane is a sign of life. And even on earth, methane can apparently be created by chemical or geological processes. What makes Mars’s methane so special? I was probably asleep during that particular lecture....
  3. Thanks for the comments. A bit of a reprocess with the same data.
  4. Hi folks, OK. Not another Orion Nebula. I've not done any DSO imaging for a long while. Looking at my files, the last time I attempted imaging M42 was way back in 2009! This is the result of just 50 minutes of 2 minutes exposures each of HA and Oiii. Perhaps I'm just lazy, but it's so easy to overexpose this one, and I quite like the understated effect. I particularly like the fact that you can see the blue stars of the Trapezium so well, and other subtle details in the core that often got lost with longer exposures. Omegon RC8, Atik 383L+ mono, HA and Oiii filters. Synthet
  5. Impressive. I've always wanted to see or capture the Pup. Not easy at 52 degrees North, but it's at its greatest elongation now so I must try again.
  6. I have for sale my Atik 428ex mono. It's a superb sensitive CCD in excellent condition. I've captured objects down to about mag 20.5 with it. I've decided to sell as it's better suited to imaging with, say, 500-800mm focal length, than the 1600mm than I'm currently using, in terms of arc-secs per pixel.. Boxed and complete with 5 metre USB cable and 1.25cm nosepiece. You will need a 12v DC cable. £430 for quick sale, including first class tracked postage. UK only (I'm in Norfolk). Features Sensor Type CCD - Sony ICX674 – 3MP Horizontal Resolution: 1931 pixels Vertical
  7. I agree, they’re not well matched, but they’re all I have at the moment!
  8. First clear night for weeks last night and, great, binning with the QHY5 works! A quick session on the Horsehead still only had 3 stars in the field of view, but the guide star was bright and guiding seemed very good. I think my focus was a bit off. 15 x 600 sec exposures, RC 8, Atik 428ex, Baader Ha filter.
  9. ...and apparently you can bin the QHY5 too. That's something I didn't realise. So maybe I don't need a new camera after all.
  10. Opps. Sorry, it looks like you can bin the ASI290 2x.
  11. Thanks for the info vlaiv. Unfortunately, I don't think you can bin the ASI290 in PHD.
  12. Thanks, Vlaiv. Here's the current configuration. It's a nice big prism, and you can see the whole of the sensor reflected up the OAG tube (please excuse the dust!). I think that the prism is about far into the light beam as possible without affecting the imaging camera. Maybe it could go a little further. I'm not sure of the make of the OAG. Exposures are 3.5 seconds. The distance from the prism to the sensor is about 45mm.
  13. Hi folks, I currently use an old QHY5-ii mono cam for off-axis guiding with my RC8 (focal length 1600mm), but often fail to locate a single guide star or only manage to find one due to the narrow field of view. I would like to try out the new multi-star guiding facility of PHD, so wondered what would be the best guide camera to use. I have a ZWO ASI290MM for planetary imaging which I understand is more sensitive than the QHY5, but its sensor area is only half that of the QHY. Looking at the alternatives (see my plan below), The 174MM looks like a good option, and its sensor is more than d
  14. I ventured out for my first bit of astro-imaging for many months this evening. I did this quick capture of Mars. It shows how much it's shrunk over the past few months. The first image was captured back in November when its apparent diameter was 16 arc seconds. Now it's only 9.3. Not a great capture but still showing some detail, notably Syrtis Major. Approximately 25000 frames, 200mm f/8 RC, 3x Televue Barlow, ASI290MM mini camera, IR, G and B filters.
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