| 11. | The Minor Planet Center does not directly list a semi-major axis for this comet.
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| 12. | This is the major axis of the ellipse, the line through its longest part.
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| 13. | One can think of the semi-major axis as an ellipse's " long radius ".
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| 14. | The gravitational encounter causes Neptune's semi-major axis to jump outward.
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| 15. | Its semi-major axis is among the smallest for hot Jupiters.
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| 16. | Objects in hyperbolic orbits have negative semi major axis, giving them a positive orbital energy.
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| 17. | Gliese 422 b's semi-major axis is astronomical units and its orbital period is Earth days.
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| 18. | The major axis travels east-west from the entrance through the court to the waterside terrace.
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| 19. | The baptismal font, altar, major axis of the ellipse.
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| 20. | The orbital circumference should be computed from the semi-major axis using Ramanujan's approximation for ellipses.
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