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How can we tell how elliptical an exoplanet's orbit is?

Updated: 8/20/2019
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9y ago

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It takes five good observations to find the orbital elements for a planet. The observations need to be taken over enough time for the planet to cover a good fraction of the orbit. That allows an ellipse to be fitted to the measurements.

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9y ago
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Q: How can we tell how elliptical an exoplanet's orbit is?
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