It doesn't. When a spacecraft can be targetted to within less than a km from a range of tens of millions of km - the model does not fail.

Please present the observational data that demonstrates that the current value of the mass of Mars is wrong by 2-14%. Given the exceptionally successful Mars flyby by Rosetta - and the planned flyby by Dawn. Those flybys would deviate- a very VERY significant amount - from predictions. The vehicles in orbit around Mars would be lost, years ago - and the vehicles that have landed on Mars, would not have done so. John Anderson, discussing the flyby anomaly on PR last week, said the effect is so small, it's not worth modeling for interplanetary navigation.

You're continuing to insist that a dramatic, drastic, massively critical value required for interplanetary navigation s wrong by an ENORMOUS amount - and there is not one IOTA of evidence to prove that it is. There is massive massive amounts of evidence to prove that our knowledge of the mass of Mars is DAMN accurate, time and time and time again.

Prove it Jerry - show me evidence that our value for the mass of Mars is wrong. Prove it - just a shred of evidence.


Doug