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Old September 12, 2019, 20:48   #26
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Originally Posted by Dazed and Confused View Post
Is this all a galactic shooting gallery and Earth is the sitting duck?!
Funny you should ask that.

In particular, Ye grew fascinated with one of the comet’s orbital parameters: its eccentricity. If an orbit’s eccentricity is zero, the object traces a perfect circle around its home star. The more elongated and narrow the orbit, the closer the eccentricity gets to one. If an object in our solar system has an eccentricity greater than one, it means the object has an arc-shaped trajectory and is making a one-time visit. The Minor Planet Center says that C/2019 Q4’s eccentricity exceeds three.

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