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1 keitaro@sci.kumamoto-u.ac.jp * 1 12 Fred Lawrence Whipple *

2 , 3 2,

3 1 AJ AJ Dirk Brouwer Paul Herget 4 J3J5 6 7 AJ Boris Garfinkel

4 NASA 20 Charles Whitney NASA NASA Ph.D. Ph.D. astronomer NASA NASA NASA

5 TMT Giuseppe Colombo Bepi 1 * 2 Imre Gyula Izsak ,000 * 2 JAXA ESA

6 William Kaula Ohio State NASA UCLA UCLA Ph.D. 6,000 6,000 John P. Vinti xyz z 2 J2J

7 high eccentricity high inclination 3 AJ NASA NASA 1 Sverre Johannes Aarseth Mauri Valtonen lunar theory ei

8 ei 1 2 Mathematica 2 2,000 2,000 e i 3,040*

9 e i IAU 1962 * 3 2 * 4 JPL James Gerard Williams 1 3,040 *

10 * 5 z 1 Brian Geoffrey Marsden * 5 James 2, ApJS citation history

11 2 5 citation history SAO/NASA Astrophysics Data System 2 90 ADS Scott Tremaine

12 1 1 Garfinkel B., 1959, Astron. J. 64, 353; Kozai Y., 1959, Astron. J. 64, 367; Brouwer D., 1959, Astron. J. 64, Kozai Y., Whitney C., 1959, SAO Special Report 30, 1 3 Kozai Y., 1962, Astron. J. 67, Brouwer D., 1947, Astron. J. 52, , 451. A Long Interview with Prof. Yoshihide Kozai 3 Keitaro Takahashi Graduate School of Science and Technology, Kumamoto University, Kurokami, Kumamoto , Japan Abstract: Prof. Kozai entered the department of astronomy in the University of Tokyo several years after the second World War. He chose celestial mechanics as his major and received guidance from Prof. Yusuke Hagihara. This is the third article of a long interview with Prof. Kozai and this time he talked on his stay in the USA and the Kozai mechanism

13 1. 3 π/23π/ m 0 rm r r r x a, e, i, Ω, ω x y 2 d r r R = Gm dt r r G R 1 rr R = Gm r 3 r r 12 Gm H = R(,) r t 2a H R 2 R r/r2 e i e i R R R z 2 l = Gma(1 e ) cos i z

14 4 3. Gm H = R 2 a R Rl z R* l z * R* = (2 + 3 e )(3 cos i 1) + 15e cos 2ω sin i 2 l = 1 e cos i *z R* l z *i ω e l z * ω e R* ω e 4 m 1.0 m 0.001, a 5, e 0 a 0 2.5, e 0 0.3, i 0 1.0, Ω 0 0, ω ω π/2 a, e, i 4 z e i ω e 4 02π ω i e e

15 4. 3r/r 2 z 3 1 Kozai Y., 1962, Astron. J. 67, Kokubo E., 2003, Over the Resonance (Proceedings of the 35th Symposium on Celestial Mechanics),

1 23 1 2 2 3 3 2 26 1 3 3 2 3 4 55 50 1 1 2 3 2 108 5 297

1 23 1 2 2 3 3 2 26 1 3 3 2 3 4 55 50 1 1 2 3 2 108 5 297 2 860 8555 2 39 1 e-mail: keitaro@sci.kumamoto-u.ac.jp 1 3 2 1 * 1 * 1 296 2015 5 1 23 1 2 2 3 3 2 26 1 3 3 2 3 4 55 50 1 1 2 3 2 108 5 297 10 2 24 3 3 298 2015 5 50 7 A B C D A B C D A α cos s B α sin

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