Brightness variations of 2012 DA₁₄ around the closest approach at 19:33 UT on February 15, 2013 (MJD 56 338.8146). The upper left and upper right panels show the lightcurve with time and solar phase angle, respectively. The open circles and solid line represent the photometric data and the best-fit model generated by a combination of the H-G phase function. The dashed line in the upper right panel represents the model phase function with G = 0.44, which was derived from our best-fit model. The lower left and lower right panels show the residual to the best-fit model of the lightcurves with time and solar phase angle, respectively. In the all panels, the error bars indicate the 1σ photometric uncertainties.