Perturbed ephemeris below is based on elements from MPEC 2021-W31. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2459240.50000 2459251.4776758 124.26343 282.67909 30.17698 e q a Epoch (TT) 0.9648279 2.2761668 64.71515 2021/01/26.00
m1 = 9.0 + 5 logΔ + 20.0 log r(t - 60)