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your potential energy is off by precisely 22 orders of magnitude, just the kind of erroneous result you'd expect, for instance, if you used G = 6.67 x 10^11 N m^2 kg^-2.
your potential energy is off by precisely 21 orders of magnitude, just the kind of erroneous result you'd expect, for instance, if you used G = 6.67 x 10^11 N m^2 kg^-2 and then made an additional error of a factor of ten (perhaps during a multiplication of 5 by 2?)
... I just simulated the sun (M=2e30 kg) with two identical planets
(m=6e24 kg) revolving on a circular orbit (R=1.5e11 m). The system
potential energy is -1e55 J while its kinetic energy is only +5e33
J. For obvious reason, the magnitude of potential energy is much
higher than kinetic energy.