# Tag Info

### Problem with the Orbital Precession predicted by the Relativistic Acceleration equation used in the JPL D440-D441 Ephemerides - please advise

If you switch to polar coordinates and use the classical Newtonian gravitation of $GM/r^2$ (inwards) you get a centrifugal term of $v^2/r$ (outwards) Since these two terms must cancel out for a ...
• 457

### Orbital decay of the sun's orbit around Sgr A*: is it likely?

Pretty much none whatsoever. The radial migration of stars within the galaxy is a slow process and not completely understood. The radial positions of stars with respect to the centre of the galaxy can ...
• 129k

### Problem with the Orbital Precession predicted by the Relativistic Acceleration equation used in the JPL D440-D441 Ephemerides - please advise

It helps to be clear at the outset what the effect of different exotic accelerations terms is upon orbit rotation. Assuming $m<<M$ and Newtonian Elliptical Orbits we have Specific Angular ...
• 1,418