# Jupiter, Saturn, Uranus, Neptune system GM

I'm modelling the solar system. I'm using data from Nasa. To do this I'm using the barycenter of the planets Jupiter, Saturn, Uranus, Neptune. However the website fails to give the Gravitational Parameter $\mu$ for these barycenters, even though it does do so for Pluto's barycenter. To make matters more confusing, the $\mu$'s given at Wikipedia are slightly different, though I assume these are just out of date.

So I'd like to know if there's an as up to date resource as possible available for these parameters. Paywalls should be OK as long as they are of major publications. $$\frac{\mathrm{AU}^3}{\mathrm{M}_\odot\cdot\mathrm{day}^2}$$ -form also good.