Perturbed ephemeris below is based on elements from MPC 65936. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2457120.50000 2457135.7431685 59.87966 175.81215 2.71643 e q a Epoch (TT) 0.6215813 1.1715024 3.09578 2015/04/08.00
m1 = 13.5 + 5 logΔ + 20.0 log r