| 21. | Pfeiffer, 1854 : Shell shape is oblong-conic or ovate.
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| 22. | So, can there be sines for other conic sections as well?
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| 23. | :Also has your reseasch unearthed Astrodynamics # The patched conic approximation?
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| 24. | I assume the intersection between them is a conic section.
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| 25. | Write down the general equation for a conic through those three points.
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| 26. | Non-degenerate conic sections are always " smooth ".
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| 27. | This approach is often used in conjunction with the patched conic approximation.
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| 28. | (Original description ) The elongate-conic shell is flesh colored.
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| 29. | The ovate, bi-conic shell is quite thick and solid.
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| 30. | The ovate-conic shell is perforate, solid, and shining.
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