Perturbed ephemeris below is based on elements from MPEC 2025-DP4. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2460280.50000 2460280.3946243 211.47205 314.83549 158.01413 e q a Epoch (TT) 1.0013374 7.7601136 2023/12/02.00
m1 = -4.0 + 5 logΔ + 20 log r(t + 150)