Perturbed ephemeris below is based on elements from MPEC 2023-UR6. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2458400.50000 2458389.4617670 269.46711 46.57957 7.38928 e q a Epoch (TT) 0.5496467 1.7328238 3.84770 2018/10/09.00
m1 = 15.5 + 5 logΔ + 10.0 log r