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cloudsweeper

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cloudsweeper last won the day on June 13

cloudsweeper had the most liked content!

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About cloudsweeper

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    Brown Dwarf

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    Male
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    Physics, maths, history (family, military, social), pre-modern architecture.
  • Location
    Merseyside, England
  1. cloudsweeper

    Splitting the Trapezium

    Another good read, Neil. I got the E & F stars easily with the Dob a few weeks ago - I was using x144 and up they popped with DV. Since they are faint, the transparency must've been good that morning! Doug.
  2. cloudsweeper

    Identical Crescents - A Great Start To The Day!

    Glad I got you to share the spectacle with the rest of us, Neil! D.
  3. Having been frustrated by poor skies on recent evenings, I was pleased to glance out at 6.05am this morning and see a clear sky. Even better, looking low to SE, there was a lovely slim waning crescent Moon and Venus close by. A quick view from the front of the house through the 10 x 50s showed that Venus's crescent had the same orientation, and the rest of the Moon's disc was a very clear pale grey - a most pleasing sight overall. By 6.25, the pair could seen from the garden with the Bresser Dob, although they were low and a few bamboo leaves were getting in the way. Everything was of course clearer and more stable than with the binos. Flitting between Venus and the Moon was a real delight - they were almost identical in shape, both with horns pointing downwards. The Moon was much paler, and showed a little detail beyond the terminator, whereas Venus was a smaller and more brilliant version, with about a third of its disc illuminated. 6.40 - time for breakfast, after an unexpected and wonderful start to the day! Doug.
  4. Great news! I recently acquired a Meade 5000 UWA 24/82 for my Bresser - it gives a decent field of view, without excessive exit pupil. I'm sure you'll enjoy your new toy. Going back a bit, you mentioned a 30mm EP. That would be a good idea for finding your way round. A Revelation 30 would not give much more than your new 24mm, but since you're into the ES 82 series, the ES 30/82 would give a handy 2 deg. A lower cost/weight alternative is the Baader Aspheric 36/72. Have fun! Doug.
  5. cloudsweeper

    Turning Luddite??

    Indeed, Alan. I reckon careful alignment plus the wider field of a Dob would put the target well in view. We all find our own way in this hobby, depending on preferences and conditions, and trying different approaches is great for widening experience! Doug.
  6. cloudsweeper

    Turning Luddite??

    Love it, Ruud. Can't decide whether it's irony or paradox! Doug.
  7. cloudsweeper

    Turning Luddite??

    10" Bresser Dob compared with 8" SCT - 56% more light, slightly better resolution (20%), and a wider field (about 50%) at lowest mag, although that is at the cost of larger exit pupil/poorer contrast. (Still good for finding you way round though.) But the 8SE is a great 'scope, with good, sharp views over a wider field, and now seems very small and manageable! As I said, I shall probably use it more on the manual mount, preferably with the frac. Doug.
  8. cloudsweeper

    Turning Luddite??

    Yes, @Stu and @Lurcher - a free-moving Dob with GoTo/PushTo does have its attractions. I'll try to resist! Doug.
  9. cloudsweeper

    Turning Luddite??

    The Dob has dominated my observing for a few months now, and I have got comfortable with rapid scanning and easy aiming, followed by a hop or two to target (usually!). Also, starting with a True Field of 2deg (or slightly more) facilitates the process. A few nights ago, I thought I'd get reacquainted with the 8SE/GoTo, and the relative slowness involved in alignment and scanning were quite apparent. Furthermore, the True Field was down to 1.34deg at best, which seemed somewhat limiting, especially if the GoTo is "out". Say it's around just 2/3 of a degree out - it will miss small targets completely, although to be fair, very careful alignment can largely overcome this. GoTo is of course a great aid, which can save a lot of time when taking in several targets, but overall, I found I was missing the manual, wider field approach. I also recently used the 8SE on a dual mount, with the ST120 as a very widefield guidescope - a fast and accurate way of enjoying the benefits of the 8SE tube. It's all a matter of what we get used to, and personal preferences I suppose. But I do feel the inner Luddite stirring! Doug.
  10. cloudsweeper

    Catharina sunset crater ray

    Nice read, Stephan - just what I need while it's wall-to-wall cloud here lately. And Yes, the Moon always has something to please! Doug.
  11. cloudsweeper

    Theory of Everything?

    Interesting thread. I love existence, relationships, hobbies (inc. astro of course) - the whole thing. But I really don't need there to be a reason or a meaning for it all. I can live happily with the possibility that it is all random/meaningless/without ultimate purpose. Doug.
  12. Excellent choice of telescope! For finding your way round, an ES 82 30mm would be great, giving about 2 degrees of field. Larger focal lengths would give a poorer view in terms of contrast/background brightness. And Yes, coma will be noticeable at the edges, but it doesn't diminish the experience or detract from the enjoyment of nebulae and galaxies. And with large clusters for example, you only focus on the central region anyway. I personally prefer the less-than-sharp edge clarity to putting in more glass and weight. (Not to mention more expense.) Doug.
  13. cloudsweeper

    When Is A Double Not A Double?

    ...well, not one you can split with a telescope anyway. These include astrometric, spectroscopic, and eclipsing doubles. Out early this evening, I was keen to see something new that the bright Moon would allow me, and aimed for Eltanin, Grumium, and Rastaban in Draco. I hadn't planned anything, so was working blind, so to speak. Stellarium indicated that these three are doubles, which is what attracted me. Stellarium is of course a brilliant aid, and it was correct in this assertion. But no joy with splitting the three. Later investigation showed why: Eltanin might have a companion, some 1000 AU away. Grumium probably has a faint optical companion. Rastaban has a small, cool dwarf companion at about 450 AU, with a period of some 4000 years. So no actual observation, but still an interesting exercise, and a reminder to do more preparation before venturing out! Doug.
  14. cloudsweeper

    Moon Lovely NOW, Plus Change Of 'Scope

    cloudsweeper: The brief session ended with something of a shock as a jet shot right over Copernicus, leaving two black streaks across the face of the Moon for a couple of seconds! Trikeflyer: Seeing was good and the surface was pin sharp, just like flying over it in a jet! Copernicus was the centrepiece for me last night. So that was you then! (Nice session/report BTW, Trikeflyer!) Doug.
  15. cloudsweeper

    Tricky Double Double In Auriga, And More

    Thanks Gus. I shot out when I saw Auriga, because I only spotted one of the Tau/Nu companions the other night. So mission accomplished! (BTW - not heard much from you lately - have you been out of action, or have our paths just not crossed? And I gave the Skytee an outing y'day evening - a great purchase, thanks again!) Doug.
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