Perturbed ephemeris below is based on elements from MPC 80898. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2458720.50000 2458712.9586460 172.11382 125.80979 13.19408 e q a Epoch (TT) 0.4237122 2.0891031 3.62510 2019/08/25.00
m1 = 14.0 + 5 logΔ + 10.0 log r