楕円
r = 432 ( a 2 − b 2 ) 2 ( a − b ) 6 b a Q 3 {\displaystyle r={\tfrac {432\left(a^{2}-b^{2}\right)^{2}(a-b)^{6}ba}{Q^{3}}}\,} Q = b 4 + 60 a b 3 + 134 a 2 b 2 + 60 a 3 b + a 4 {\displaystyle Q=b^{4}+60ab^{3}+134a^{2}b^{2}+60a^{3}b+a^{4}\,} v 1 = b a ( 15 b 4 + 68 a b 3 + 90 a 2 b 2 + 68 a 3 b + 15 a 4 ) {\displaystyle v_{1}=ba\left(15b^{4}+68ab^{3}+90a^{2}b^{2}+68a^{3}b+15a^{4}\right)\,} v 2 = − a 6 − b 6 + 126 a b 5 + 1041 a 2 b 4 + 1764 a 3 b 3 + 1041 a 4 b 2 + 126 a 5 b {\displaystyle v_{2}=-a^{6}-b^{6}+126ab^{5}+1041a^{2}b^{4}+1764a^{3}b^{3}+1041a^{4}b^{2}+126a^{5}b\,}