Quote:
Originally Posted by Robh
This is not my experience. You must have really good skies in your area! I regularly check beta Muscae as a gauge of seeing. The two stars are separated by about 0.9". Only on rare occasions do I see a clean split. More magnification simply makes the pair look like a bigger blob.
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The sky at my place is typically light-polluted and has so-so transparency, but the seeing can get good.
Thanks for the Beta Mus tip, I've added it to my observing list. I've got a big tree blocking my southern view (which managed to survive Saturdays freak storm) but Beta Mus should peak out during certain times. Based on results with similar doubles I should be able to split it (or at least see two touching spurious discs with figure-8 shaped first diffraction rings), but it will likely require well over 300x.
I think the T-Rex may be too big for high-mag work, being affected by seeing too much
Cheers
Steffen.