Perturbed ephemeris below is based on elements from MPC 77406. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2458400.50000 2458393.4099723 269.16627 46.86867 7.38025 e q a Epoch (TT) 0.5503647 1.7316192 3.85116 2018/10/09.00
m1 = 15.5 + 5 logΔ + 10.0 log r