| 单词 | osculating ellipse |
| 释义 | > as lemmasosculating ellipse osculating ellipse n. Astronomy an ellipse that represents the orbital elements (element n. 7a) of a celestial object at a given moment but, because it does not allow for perturbation effects, differs from the actual orbit that the object will follow. ΚΠ 1855 Philos. Trans. (Royal Soc.) 8 335 Thus the instantaneous ellipse, relatively to the moving axes, is of the same dimensions and in the same plane as the osculating ellipse; and it only remains to show that it coincides with the latter in position. 1907 Ann. Math. 8 145 As the eccentricity of the osculating ellipse seems to be of importance, it appears worthwhile to calculate the change of eccentricity during a revolution. 1988 A. E. Roy Orbital Motion (ed. 3) vi. 164 If the elements of the orbit (let it be an ellipse) are a0, i0, i0, Ω0, ω0 and τ0.., the ellipse with these elements is called the osculating ellipse while the elements are referred to as the osculating elements at time t0. < as lemmas |
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