The universal constant of Gravitation,

G ~= 6.670 x 10-11 n.m2/kg2


G ~= 1.477 x 10-10 lb-force.ft2/lb-mass2

Applying G to the gravitational force formula

F = G m M / d2,

where m is the mass of one body, M is the mass of the other body, and d is the distance between them, yields the force in pounds of force or newtons.

(I think ME123 means N/kg and not simply N).