Comet Tsuchinshan-ATLAS enters LASCO C3 field of view, first full-resolution science data from STEREO shows comet is very bright

Comet C/2023 A3 (Tsuchinshan–ATLAS), discovered in January 2023 by the Tsuchinshan Observatory and the ATLAS project, reemerged from behind the Sun in September and garnered attention from astronomers across the world due to its rapid brightening. On October 7, 2024, the comet entered the LASCO C3 field of view, beginning a series of rare observations accessible to more than just astronomers with specialized equipment.

Source