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I do not consider this source to be authoritative, however you might be interested in the article:bluecap said:So how many multiples increase in the local dark matter density of our solar system before it can change the gravitational properties of our solar system?
https://darkmatterdarkenergy.com/2013/08/30/dark-matter-in-the-solar-system-does-it-matter/
A quote from it:
Thus one can conclude that even if the dark matter density in the Solar neighborhood were 10 or even 100 times larger than expected from stellar dynamics observations, that its gravitational effects on the precisely measured orbits of the major planets and major moons in the Solar system would be of no consequence.