Perturbed ephemeris below is based on elements from MPC 69911. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2456520.50000 2456536.3363289 98.01891 5.04836 3.42795 e q a Epoch (TT) 0.3411052 2.3280266 3.53323 2013/08/16.00
m1 = 12.5 + 5 logΔ + 10.0 log r