3I/ATLAS, also known as C/2025 N1 (ATLAS), is the third interstellar object (ISO) discovered in July 2025. ISOs are particularly interesting because characterizing their physical properties helps us understand and test our knowledge of Solar System formation. Several quick response observations of 3I/ATLAS were performed during the first few days after the discovery, and various … Continue reading Simultaneous Visible Spectrophotometry Of Interstellar Object 3I/ATLAS With Seimei/TriCCS