Theta Persei (Theta Per, θ Persei, θPer) is a star system 37 light years away from Earth, in the constellation Perseus. It is one of the closest naked-eye
opening. The time lift integral is given by ∫ L d θ = R T 2 π ( cos θ 2 − cos θ 1 ) + r T 2 π ( θ 2 − θ 1 ) , {\displaystyle \int L\,\mathrm {d} \theta
Erlang distribution): F ( x ; k , θ ) = 1 − ∑ i = 0 k − 1 1 i ! ( x θ ) i e − x / θ = e − x / θ ∑ i = k ∞ 1 i ! ( x θ ) i . {\displaystyle F(x;k,\theta
/ 2 cos ( θ ) I max sin ( θ ) d θ d ϕ = 2 π ⋅ I max ∫ 0 π / 2 cos ( θ ) sin ( θ ) d θ = 2 π ⋅ I max ∫ 0 π / 2 sin ( 2 θ ) 2 d θ {\displaystyle
r ^ + r θ ˙ θ ^ , r ¨ = ( r ¨ r ^ + r ˙ r ^ ˙ ) + ( r ˙ θ ˙ θ ^ + r θ ¨ θ ^ + r θ ˙ θ ^ ˙ ) = ( r ¨ − r θ ˙ 2 ) r ^ + ( r θ ¨ + 2 r ˙ θ ˙ ) θ ^ . {\displaystyle