 Nominal solar and planetary conversion constants by the International Astronomical Union

The adopted nominal solar radius is $6.957\times 10^8\mathrm{m}$ and nominal solar mass parameter is $1.3271244\times 10^{20}{\mathrm{m}}^3{\mathrm{s}}^{-2}$. These are conversion conventions; they do not provide a measured radius or mass for another host star.