Light curves of 2001 QJ142 and two nearby stars. Top: Fluxes of 2001 QJ₁₄₂ and two nearby stars. Measured fluxes are normalized by the mean such that the averages are unity. Bars indicate the 1σ uncertainties. Uncertainties of two nearby stars are hard to see due to scale effects. Middle: Light curves of 2001 QJ₁₄₂ and nearby star 1 corrected using nearby star 2. Relative fluxes of 2001 QJ₁₄₂ and nearby star 1 are presented as circles and triangles, respectively. Bars indicate the 1σ uncertainties. Bottom: Light curves of 2001 QJ₁₄₂ and nearby star 2 corrected using nearby star 1. Relative fluxes of 2001 QJ₁₄₂ and nearby star 2 are presented as circles and squares, respectively. Bars indicate the 1σ uncertainties.