r = c 2 r 0 2 / G M 1 + ( c 2 r 0 G M − 1 ) c o s θ {\displaystyle r={\frac {c^{2}r_{0}^{2}/GM}{1+({\frac {c^{2}r_{0}}{GM}}-1)cos\theta }}}
δ = 2 G M c 2 r 0 − G M {\displaystyle \delta ={\frac {2GM}{c^{2}r_{0}-GM}}}
