Apparent Angle Evolution of the Comet’s Ion Tail (C/2025 A6 (Lemmon))

by Julien De Winter

Equipment: Askar FRA600, ZWO ASI2600MM Pro

Integration: 1h 8m

The ion tail of a comet is made up of ions and charged particles that are pushed away by the solar wind. It always points in the direction opposite to the Sun , regardless of the comet's position. When observing the comet from Earth with a camera positioned at 0°, the apparent angle between the comet and the line of sight gradually increases as the comet approaches. When this angle reaches…