He mentions a 10% error in energy conservation, so not too great.
Probably he should have done research before he started, he would have found one of the several lecture notes that tell you how to integrate orbits. They tell you that symplectic methods are great for time reversible problems.
Or he would have found one of the public codes for integrating the solar system very far into the future.
Probably he should have done research before he started, he would have found one of the several lecture notes that tell you how to integrate orbits. They tell you that symplectic methods are great for time reversible problems.
Or he would have found one of the public codes for integrating the solar system very far into the future.