G_⊥ versus G_|| green line shows the G₁₂ relationship with marked values. Top : objects in our dataset calculated from G₁ and G₂ derived from H,G₁₂ fits. Arrows extending from the G₁₂ relationship indicate the approximate corresponding shift when LC maxima are used. Bottom : the gray lines show the photometric slopes (β₀) from 1.0 to 3.0 mag/rad in 0.2 increments. The theoretical G₁₂ relationship is shown as the blue line.