Delta = 8.46984126984127e-06 = 1.74703016846747 arcsec delta_phi = 5.15968560552266e-07 = 0.106426155171906 arcsec P = 7315382.57698552 s = 0.231810485492735 yr delta_phi_100yr = 0.000222582062867228 = 45.9108460713879 arcsec