Perturbed ephemeris below is based on elements from MPEC 2021-N06. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2457920.50000 2457904.9787390 253.20572 354.32797 4.27909 e q a Epoch (TT) 0.5811658 2.3342392 5.57318 2017/06/16.00
m1 = 10.5 + 5 logΔ + 20.0 log r