Perturbed ephemeris below is based on elements from MPEC 2021-F20. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2461560.50000 2461578.1034994 297.96776 102.77965 11.09176 e q a Epoch (TT) 0.4818443 1.8816527 3.63144 2027/06/04.00
m1 = 13.0 + 5 logΔ + 11.0 log r(t - 60)