The Time of Perihelion Passage and the Longitude of Perihelion of Nemesis

If Nemesis, a hypothetical solar companion star, periodically passes through the asteroid belt, it should have perturbed the orbits of the planets substantially, especially near times of perihelion passage. Yet almost no such perturbations have been detected. This can be explained if Nemesis is comprised of two stars with complementary orbits such that their perturbing accelerations tend to cancel at the Sun. If these orbits are also inclined by 90 ° to the ecliptic plane, the planet orbit perturbations could have been minimal even if acceleration cancellation was not perfect. This would be especially true for planets that were all on the opposite side of the Sun from Nemesis during the passage. With this in mind, a search was made for significant planet alignments. On July 5, 2079 Mercury, Earth, Mars+180°, and Jupiter will align with each other at a mean polar longitude of 102.161°±0.206°. Nemesis A, a brown dwarf star, is expected to approach from the south and arrive 180 ° away at a perihelion longitude of 282.161°±0.206 ° and at a perihelion distance of 3.971 AU, the 3/2 resonance with Jupiter at that time. On July 13, 2079 Saturn, Uranus, and Neptune+180 ° will align at a mean polar longitude of 299.155°±0.008°. Nemesis B, a white dwarf star, is expected to approach from the north and arrive at that same longitude and at a perihelion distance of 67.25 AU, outside the Kuiper Belt. The mass of Nemesis A is estimated to be 2.545 Jupiter masses, an