Perturbed ephemeris below is based on elements from NK 731. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2458680.50000 2458660.5200642 231.28108 137.88462 7.56500 e q a Epoch (TT) 0.6718130 1.1244640 3.42629 2019/07/16.00
m1 = 20.5 + 5 logΔ + 10 log r