Perturbed ephemeris below is based on elements from CCO 17. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2455800.50000 2455812.7954801 48.56236 0.06882 12.64404 e q a Epoch (TT) 0.9788669 0.0531584 2.51541 2011/08/27.00
m1 = 27.8 + 5 log d + 17.5 log r(t - 0.17)