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Mark9473
Carpal Tunnel
Reged: 07/21/05
Posts: 2781
Loc: 51°N 4°E
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Re: 100 Hercules at 8.5x
06/14/08 05:50 PM
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I was going to make splitting 100 Her at 8.5x my project for the summer, but in 10 seconds it was all over.
I went out under a mag 3.5-4 sky - with the waxing gibbous Moon and perpetual twilight here at 51 degrees North, it just doesn't get better. Vega was a bright beacon of course, and all I needed to hop 12 degrees to the southwest, to the little asterism in Hercules dominated by zeta and omicron Her.
100 Her was immediately spotted and seen to be more than a single dot of light. Centered it, adjusted focus a tiny bit, and it was split!
At 8.5x the image scale for watching doubles is minuscule, and sometimes it is difficult to see if the two components are touching or split, but here there was not much doubt. In fact, I noticed that the double cycled between touching an split in sync with my heartbeat.
100 Her has instantly become a favourite target as it is quite a spectacular sight. But the hunt was over so quickly that it's almost a shame it didn't put up more of a fight.
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Mark
Leica 8x20; Vixen 8x42; Swift 8.5x44, 10x50 and 20x80; TS 7x50; Orion 15x63
WO Megrez II 80 FD + Baader 90° T2 Amici
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