Hi Andrew, the aim of the game is to observe and let the chips fall where they may. The 1 sigma bands represent an area of uncertainty in the known orbit of the asteroid, and perhaps the position of the star as well. A negative observation on the borders helps to narrow down those 1-sigma bands. Certainly a positive is worth "more" to the observer because it's fun and exciting. But to the calculations, it's all data.
Regards,
Tony Barry
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