Perturbed ephemeris below is based on elements from MPEC 2023-D41. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2459400.50000 2459413.4147939 256.99550 203.50789 14.24310 e q a Epoch (TT) 0.4489036 5.1485887 9.34245 2021/07/05.00
m1 = -16.0 + 5 logΔ + 42.5 log r(t - 80)