Quote:
Originally Posted by Robh
I'm no expert but it looks to me like you have the results of two separate star grazes by three observers on the one profile. Is this correct? The upper one shows a shorter disappearance and then a longer one by one star. You need to imagine an arc parallel to the lower one. I think the lower one was a longer disappearance by a different star. The red dots indicate a disappearance and the green a reappearance (I hope that is the order). Not sure why one pair is in yellow.
The path of the star is probably in an arc which is greatly exaggerated in the vertical scale in arc seconds.
Regards, Rob
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100% spot on Rob.
The stars were SAO 162922 (upper) and SAO 162930 (lower) grazing at the southern cusp.