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While Newcomb's theory, and general relativity, don't lead to closed-form solutions, both theories can be solved numerically to as much precision as one desires.

While Newcomb's theory, and general relativity, don't lead to closed-form solutions, both theories can be solved numerically to as much precision as one desires.

General relativity was developed to predict this extra precession, in the amount of <math>3{}v^2/c^2</math> revolutions per planet's "year", where <math>v</math> is the planet's average orbital speed.  But more accurate, modern measurements of Mercury's precession disproves general relativity, as it predicts incorrect values greater than measurement error.

General relativity was developed to predict this extra precession, in the amount of <math>3{}v^2/c^2</math> revolutions per planet's "year", where <math>v</math> is the planet's average orbital speed.  But more accurate, modern measurements of Mercury's precession disproves general relativity, as it predicts values incorrect by more than measurement error.

The following table show some approximate parameters for the planets.  Note that Mercury has the smallest orbit, the fastest speed, and the highest gravitational pull.  Precession of planets other than Mercury is very hard to measure.

The following table show some approximate parameters for the planets.  Note that Mercury has the smallest orbit, the fastest speed, and the highest gravitational pull.  Precession of planets other than Mercury is very hard to measure.