2 π r : 1 A U = 360 ∘ × 60 ′ × 60 ″ : p {\displaystyle 2\pi r:1AU=360^{\circ }\times 60'\times 60'':p} r ≒ 206265 ″ p × A U {\displaystyle r\fallingdotseq {\frac {206265''}{p}}\times AU} ( a 3 P 2 ) M e r c u r y = ( a 3 P 2 ) V i n u s = ( a 3 P 2 ) E a r t h = ⋯ = ( a 3 P 2 ) N e p t u n e {\displaystyle ({\frac {a^{3}}{P^{2}}})_{Mercury}=({\frac {a^{3}}{P^{2}}})_{Vinus}=({\frac {a^{3}}{P^{2}}})_{Earth}=\cdots =({\frac {a^{3}}{P^{2}}})_{Neptune}}
