2023a3 20241020 rkaufman

I put together a montage of low-resolution spectra I took of C/2023 A3 (Tsuchinshan-ATLAS) in Sept - Oct 2024. These were taken in generally poor conditions - light sky, often hazy, short window of shooting time - so they're pretty rough. The sodium emission is clearly visible in the spectra of 21, 22 & 29 Sept, while the sodium emissions in the tail ("sodium tail") are visible before & after perihelion, 26, 27 & 29 Sept.