Gravity is based on density and magnetism

Improved Gravity Field of the Moon from Lunar Prospector
A. S. Konopliv, A. B. Binder, L. L. Hood, A. B. Kucinskas, W. L. Sjogren, J. G. Williams

This is evidence of my argument. Here is a picture of the topography (top) and gravitational field (bottom) as shown from orbital error correction.

Although I would state we are seeing an increase of gravity in this area due to the change in density of baryonic material and it's magnetic field. This magnetic field change pushes against the dark matter in this area causing the changes in orbit.