gravitational constant

https://doi.org/10.1351/goldbook.G02695
Universal fundamental physical constant in Newton's law of gravitation, G = 6.67259(85) x 10E-11 m3 kg-1 s-2.
Source:
CODATA Bull. 1986, 63, 1 (https://doi.org/10.6028/jres.092.010)