Dudley Observatory, American Astronomical Society, American Institute of Physics · New York [etc.] American Institute of Physics [etc.] · leaf 355
EFP - FP cost. The distance of the point of bisection M from C is, as in the cylinder, equal to the eccentricity of the section. For „ „„,-.> sin2i a cos2 \- a sin2 i co sin9 I a?—CM- = j- ;—r=- f r~\2 = cos (t — 2 a>)4 cos(t — Aco)J . „ , (cos2io) — sin2/) . „, cos(Z + ico) sin2*^ ■- t—^-=… … R, (cos I co ± sin t) ; see fig. 3. Cns (t I co) When t = 0°, cos (t — Is) = cos | co, sin t = 0, and J?, =sin i co, showing that the curve passes through C, the center of the base. When t = 270° — \ co, cos (t — i co) = —sin tu, sin t = — cos -J co, and showing that the curve originates at A, as…
Astronomy
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