Perturbed ephemeris below is based on elements from MPC 61178. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2456680.50000 2456672.4410899 353.21038 8.77140 1.42709 e q a Epoch (TT) 0.5734714 1.4667606 3.43883 2014/01/23.00
m1 = 17.5 + 5 logΔ + 10.0 log r