Perturbed ephemeris below is based on elements from MPC 48382. Epoch (TT/JD) T (TT/JD) Peri. Node Incl. 2456280.50000 2456279.0824425 220.08415 148.32168 8.18866 e q a Epoch (TT) 0.6528631 1.2194267 3.51281 2012/12/19.00
m1 = 20.5 + 5 log d + 10 log r