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).