J/ψ near T

We calculate the mass shift and thermal decay width of $J/\psi$ near QCD transition temperature $T_c$ by imposing two independent constraints on these variables that can be obtained first solving Schr\"odinger equation second from sum rule approach. While real part potential is determined comparing result for charmonium D meson to model result, imaginary taken proportional perturbative form multiplied a constant factor, which in turn applying constraints. The shows binding energy becomes similar magnitude at around $T=1.09T_c$, above analysis also unstable, strongly suggesting will melt slightly $T_c$.