Google “precession of star S2” to find the site

www.mphys7.ipb.ac.rs/proceedings7/10-Borka.pdf

to find a paper which I will describe in a note tomorrow. It uses a modified gravitational potential in a non relativistic theory, and this equation can be solved numerically. They give a very complicated analytical solution which they then say cannot be used. Maxima will do the job nicely to give precessing orbits. It contains model parameters beta and r0 which are determined by comparison with experimental data using G. S. Adkins and J. McDonnell, Phys. Rev. 75D, 082001 (2007) of which there is an online version. The distance r0 is about a hundred AU’s where one AU is the earth sun distance. It gives precessing orbits of minus one degree per revolution, a huge precession compared with those of planets in the solar system, and in the OPPOSITE direction to that of Einsteinian general relativity. So this is another clear experimental refutation of Einsteinian general relativity in the S2 like star systems. They do not use dark matter. The paper does not give the mass of the super massive object, but I found a closely related site that gives the mass as four million sun masses. In the Newtonian limit of the theory the orbit is an ellipse, but in general it gives a precessing ellipse with a very large precession of minus one degree per orbit. So this model could be crunched out with Maxima, and then ECE2 relativity applied to the problem at a later stage. There are no complications as in binary pulsar systems.

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