Comet Lemmon (C/2025 A6) makes closest approach to Earth on October 21
Comet C/2025 A6 (Lemmon) will make its closest approach to Earth at a distance of 0.596 AU (about 89 million km / 55 million miles) on October 21, 2025, before reaching perihelion on November 8 at 0.529 AU (79 million km) from the Sun.

