HST 2.′5 × 2.′5 color image of Cl J120958.9+495352 based on the ACS/WFC F606W (blue) and WFC3/IR F105W (green), and F140W (red) imaging. The white contours indicate the signal-to-noise ratio of the weak lensing mass reconstruction, starting at 2σ in steps of 0.5σ, with the cross marking the peak position, which is consistent with the X-ray peak (red square) and BCG position (magenta star) within the uncertainty of 23^′′ in each direction.