Perturbed ephemeris below is based on elements from MPC 94675. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2460200.50000 2460217.8583946 281.78766 280.51815 3.14869 e q a Epoch (TT) 0.6192218 1.1210418 2.94408 2023/09/13.00
m1 = 15.5 + 5 logΔ + 10.0 log r(t + 20)