Discovery diagnostics for discovered impactors at the moment of their first LSST detection. (a) Geometric: distributions of geocentric distance Δ, solar elongation ϵ, and phase angle α. (b) Kinematic: sky-plane rate μ with zoomed-in panel, heliocentric speed ﹩|{{\boldsymbol{v}}}_{\odot }|﹩, and radial range rate v_radial. (c) Photometric: m_PSF, SNR with zoomed-in panel, and trail-to-seeing ratio with zoomed-in panel.