Recovery of NEOs at 2nd return
Period P = P + D P
T (future) = T + DT + n
x (P + D P)
Longitude of
ascending node b
Angle of
perihelion w
Inclination i
Perihelion
distance q
Semi-major
axis a
Perihelion date T
a + Da
q + Dq
w + Dw
b + Db
i + Di
T + DT
Earth