Syndynes (green) and synchrones (red) for the observation images of LH₁₅. The synchrones are set for dates of 55, 45, 35, 25, and 15 days prior to the observation date and the sydynes are for β = 1, 1 × 10⁻¹, 1 × 10⁻², 1 × 10⁻³, 1 × 10⁻⁴, 1 × 10⁻⁵, and 1 × 10⁻⁶ for LH₁₅ on August 25 and August 31 of 2019. The projected Sun-LH₁₅ radial direction (-S) and the anti-velocity direction of LH₁₅’s projected motion (-V) are depicted in the top left corner of each panel.