 It is clear that if "T" gets large enough (far in the future or far in the past), the "T"² term will dominate and "p" will go to very large values.In reality, more elaborate calculations on the numerical model of the Solar System show that the precessional "constants" have a period of about 41,000 years, the same as the obliquity of the ecliptic.Note that the "constants" mentioned here are the linear and all higher terms of the formula above, not the precession itself.