Perturbed ephemeris below is based on elements from MPEC 2023-N01. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2459400.50000 2459399.3595113 338.46506 177.81217 22.29051 e q a Epoch (TT) 0.1713841 4.9871174 6.01861 2021/07/05.00
m1 = -20.5 + 5 logΔ + 50 log r(t - 550)