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About athornett

  • Rank
    Star Forming

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  • Gender
  • Interests
    Visual observing, spectrometry, radio astronomy, microscopy
  • Location
    Lichfield, Staffordshire, UK
  1. Thanks for these thoughts. I haven't done the proper Polar Alignment procedure but have used reticle in polar finderscope to centralise Polaris so I doubt I am 45 degrees off! However I do need to learn how to do the polar alignment properly - but it is good enough to allow me to take 60 sec subs on recent images, including the Witch's Broom on Wednesday night. One thought - does it matter how the puck is facing? I have presumed that it is OK as long as the telescope is facing towards Polaris when mount is turned on - but is this correct? Does puck need to face in particular direction? In particular, I recently changed to dual scope setup to accommodate a guiding scope and this means the mounting bar now lies horizontally (between scopes) across puck rather than vertically as it was with one scope (however this error in alignment did occur just BEFORE this switch as well as AFTER it). Andy
  2. Hi All I wonder if any of you can shed light on this issue I am experiencing. My mount is refusing to align "alignment failure" and is saying my position is 45 degrees out in RA. However I have checked my location and date etc many times and all seems OK. Clearly I am doing something wrong but for the life of me I can't work out what! Andy
  3. s to align and says it is 45 degrees i Hi All I wonder if any of you can shed light on this issue I am experiencing. My mount is refusing to align "alignment failure" and is saying my position is 45 degrees out in RA. However I have checked my location and date etc many times and all seems OK. Clearly I am doing something wrong but for the life of me I can't work out what! Andy
  4. Please send me personal message and we can arrange payment. Andy
  5. I am quite excited about this new Meade Illuminated 9mm eyepiece – it has adjustment screws which can Chang ether XY position of the cross hairs and allow me to align the cross hairless exactly over the spectrometer slit on my CCDSPEC spectrometer overcoming a problem I have using it at Night – the fact that i can’t see where the slit is in the dark!! Up until now I have relied on the fact that a star separates into a small spectrum when it reaches the slit but this can be hit and miss at Night. I have tried 12.5mm illuminated eyepiece without adjustment – that is OK but the cross hairs are not quite on the slit so still can be difficult in practice getting single star in correct position. Can’t wait to try this out under the stars…. For more details see https://roslistonastronomy.uk/new-illuminated-eyepiece-for-ccdspec-spectrometer Andy
  6. I am quite excited - managed to take a spectrum of Jupiter on Saturday night and show the methane absorption bands using my CCDSPEC spectrometer attached to Sky Watcher Equinox Pro 80mm - hand-guided on Manfrotto 116 video tripod! Details of observing session and other observations/spectra from Saturday can be found at https://roslistonastronomy.uk/spectra-taken-with-ccdspec-on-sky-watcher-equinox-pro-80mm-scope-with-rob-leonard-11-12-5-2019 My spectrum is in red and reference spectrum in blue. Software = RSPEC. Andy Jupiter-120719@01117-G2V-Ref-spectrum-methane-lines-marked.bmp
  7. Not quite sure with your replies who you are responding to - but I would like to buy it as I said in my previous post. Not sure what next step is as Stargazers Lounge wont allow me to send you my mobile number? Andy
  8. I am still keen to buy this - please could you message me if still available Andy
  9. If still for sale I would like to buy this - where are you located? We may need to get it shipped to me near Birmingham - but that shouldn't stop me buying it - I am sure we can find approp shipping agent as long as you strap some cardboard around it and give me the dimensions to look someone up. Andy <private contact details removed>
  10. On my way home from Astrofest in Kensington. Two days of brilliant talks with some truly world class speakers, some innovative new stuff in the exhibition, but generally less exhibitors with some big vendor names missing, not many good deals and decreasing range of stuff on sale. Becoming less the GOTO place to find your new gear but remains the definitive place to go for state of the art astronomy talks from the people who are leading projects such as New Horizons visit to Ultima Thule and other major astronomy research. Highlights this year included amongst many others Brian May and David Eicher giving us a 3D trip around the Apollo moon landings and other famous space age images, Hayabusa 2 visit to Ryugu, Paul Abel on observing planets, Allan Chapman on 300 year trip through history, what is dark energy?, black holes, aliens, and many more. I will keep coming back for more! Andy
  11. To give you some idea of what this homemade image intensified eyepiece is capable of here are some photos of galaxies, nebulae and star clusters taken HAND-HELD with Samsung S7 phone at the eyepiece on a 10" Orion Dobsonian telescope last Saturday 2/2/2019. Amongst the photos below are M81, Crab nebula, Hubble Variable Nebula, the Eyes Galaxies at the end of Markarian's Chain, Starfish Cluster in Auriga. Labels for photos available on our astro club blog https://roslistonastronomy.uk/observing-log-2-2-2019-1845-3-2-2019-0330-damian-and-andrew-photos-taken-through-the-eyepiece Andy
  12. ATM Image intensified eyepieces The commercial versions of these eyepieces cost £1500 ($2000) upwards.......here Damian and I describe how we made one for £50 ($80) - this price was for the cascade generation I tube we used - that price was when it was purchased several years ago. The main differences that we are aware of between the commercial versions and ours are:- (i) Theirs has a higher resolution - not that we noticed at the eyepiece! (ii) Ours has more distortion of the periphery of the field of view - oh well you can't have everything! (iii) Theirs are a lot lighter...no getting away from that - our version requires a sturdy telescope/mount and 2 inch focuser. What we are less sure of is:- (i) Any difference in brightness? Possibly but the image intensifer we used is a 3 stage generation 1 intensifer that gives pretty bright images (ii) Fun level - ours delivers on the fun side (iii) Both image intensifers can be used with an SLR lens without the scope - probably the best bit (iv) Ours gives you the enjoyment and sense of acheivement of having made it yourself (v) Price difference - this is one aspect of ATM where there is still a really big difference in price between the ATM version and the commercial version! Please note we accept no liability for damage or injury incurred from following our instructions (its just what we did) and we make no guarentee that this will work for you. Please let us know if you find a better way of constructing your eyepiece so we can update this website. You will need to source components - a difference image intensifer should work but you will need to modify the instructions. Plus - please note neither of us have had a chance to compare our version with the commercial versions. We hope you have great fun making your image intensifed eyepiece! You can access how we made this scope by clicking on this link: https://roslistonastronomy.uk/16065-2 where you can download instructions - I will attach main file below but note there is extra stuff on the link. Andy Instructions-making-image-intensified-eyepiece-2009.pdf
  13. I have now also uploaded a 50 minute video of the IAS: https://roslistonastronomy.uk/video-from-international-astronomy-show-2018-12-13-october-2018 Andy
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