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Davidv

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About Davidv

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  1. Similar to Ben's mine has a sturdy brass handle near to the base of the rotating section and no handle at the top of the box where I just grab the edge and carry it on its side in front of me. The handle is fitted to the back of the box, not one of the sides. The handle is horizontal to the ground and the box is about two feet high and made of 3/4 inch ply. The whole thing is fairly useless actually (sticktion, vibration etc but easy to carry).
  2. Hi, Yes, that's the wrong pair. The double double is immediately to the left of Vega on your chart. AKA Epsilon Lyrae 1 and 2 or Struve 137. Should be no problem with your scope. Dave
  3. Yes, I'd forgotten Shane knew what he was doing. That looks really good.
  4. I've always thought people wouldn't pay hundreds of pounds for a decent commercial mount if you could make something just as good with a bit of wood and some teflon pads at a fraction of the cost. I've had a home made 8.75" f7.2 Newtonian for thirty years which has been on several home made dobsonian mounts - all scrapped for the reasons mentioned on this post. Partly my own fault for not following proper designs or plans but I've wasted untold time on this and this post has reminded me not to waste any more time on dobsonian mounts. I've read some articles which indicate that you really need to know what you're doing to design and build a good dobsonian mount otherwise you can waste a lot of time and effort.
  5. Yes, Nick. Just read your post in Recent Topics. Must have a look for it. Dave.
  6. Gamma (γ) Arietis This appears to be a neglected double (on the Lounge at any rate) though it’s well worth a look and not difficult to find. According to Google it was last mentioned on Stargazers Lounge in January 2012. I decided to track it down after finding a scribbled note reminding myself to look for it. No idea where I heard about it in the first place. I am using a Vixen 80Mf for its portability factor but some fainter doubles I’ve found rather disappointing. However, I was not disappointed by Gamma Arietis which appeared as a bright white pair of stars at x 45 also x 100. Next on my list is 59 Andromedae (Struve 222) and Struve 79, also in Andromeda. (from www.theskyscrapers.org) Dave
  7. Saw 24 Comae Berenices a couple of years back. Must have another look. Split Izar for the first time a couple of weeks ago at about x160. The one which I think is really on a par with Albireo is Cor Caroli - lovely double. Dave
  8. Phil, I can only imagine Saturn would appear too bright in a 130mm scope at low power - i.e. your 25mm eyepice. This would give a bright and small image hardly big enough to show the rings let alone any detail. Your barlow should be a bit better at x 52. Your 10mm eyepiece with the barlow giving x 130 really should look very nice. Saturn is also very low down in the sky this year so you have got lots of atmospheric murk to look through which won't help regards seeing lots of detail. Stick with it! Dave SW 130p specs below. Magnifications (with optics supplied): x26 & x65 Diameter of Primary Mirror: 130mm Telescope Focal Length: 650mm (f/5)
  9. Castor in Gemini is a very impressive double. Algieba in Leo (Gamma Leonis) is also easy to find. You should split them with your 8 or 6mm eyepiece. Cor Caroli in Canes Venatici is a beautiful double on a par with Albireo. It will be better placed as spring comes around as it is below the "handle" of the Plough, Ursa Major. Another one, not quite so easy to find but worth the effort, is Beta Monocerotis in Monoceros to the left of Orion. This looks like a double but if you raise the magnification you will see it is a triple star. Your 6mm eyepiece should show it at x125. (I am assuming your 150p is F5, not F8) Hope you find them and enjoy them. Dave
  10. Haven't got a clue about your Heritage as I haven't got one, but I see from your "sgt pinback" name you must be a fan of Dark Star - one of my all time favourite films.
  11. These are very impressive. Perhaps I'm missing the obvious but are they prime focus, eyepiece projection or even afocal? Dave
  12. As already said, the magnification will be the focal length of the primary mirror divided by the focal length of the eyepiece, regardless of the diameter of the mirror. So a 200mm diameter mirror of focal length 1000mm (i.e. Focal ratio F5) will give a magnification of 100 times with an eyepiece of 10mm focal length. The same applies with refractors, not just reflectors. Dave
  13. Unless you have horrendous light pollution where you are, you should find it in an 8". I think it's about a degree away from Zeta Tauri ( to the NE, as you say) Try something like a 25mm eyepiece or one with a bit more magnification. You sometimes need just enough magnification to darken the background sky to improve contrast and pick out the object. It looks like a very faint oval smudge. Getting back to the Beehive, there are also quite a few double stars in Cancer but not very spectacular on account of being quite faint. Good luck. Dave
  14. I was out at about midnight last night with my 7 x 50s. As already said, can't beat just picking them up and stepping outside. Last night was one of the clearest nights I've seen in a while which really makes suffering the cold worth it. Saw quite a few Geminids as well. Dave
  15. John, not sure if you're referring to the belts in general which are the are North Equatorial and Temperate belts and South Equatorial and Temperate belts with Polar regions at the poles. Apologies if I'm pointing out something you already know and meant something else. http://en.wikipedia.org/wiki/File:Jupiter_Belt_System.svg Dave
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