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Rare occultation of a 5th magnitude star by an asteroid visible from UK on Sept 9/10 (early Sunday morn)


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I reckon sigma is occulted at roughly 3.09 for a second or two. So I'm very hopeful that you have it. :2thumbsup:

 

If that's actually it, and not a scintillation, you just need some accurate stopwatch on/off times.

 

Hope you can verify this and I will have time for a better study later.

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That time looks promising.  The red flash at 1min 11-12s in, marks 00:44hr BST.  If I managed to get in a sceond red flash, around 00:52, it's unreliable I think.  But may be you only need the start time marker, then the frame rate of 30 per second tells you the time after the red LED start frame (representing 00:42).

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