Comparative photometry of 2012 DR₃₀ over four nights. The error bars are given relative to the internally consistent photometry (left ordinate), and is dominated by the photon noise, found via SExtractor’s FLUXERR_APER (RMS error vector for aperture flux) values. The absolute magnitude (right ordinate) is tied to the APASS catalogue, which had up to an 0.2 m_r variation in the shift required for the standard stars, so it is provided for guidance rather than high precision.