Perturbed ephemeris below is based on elements from MPC 66923. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2457600.50000 2457617.4574418 3.92402 14.18197 21.33505 e q a Epoch (TT) 0.6376010 1.3245029 3.65482 2016/07/31.00
m1 = 18.5 + 5 log d + 10.0 log r