Interstellar Comet 3I/(ATLAS) with Blue Plasma Tail from December 14 2025

by Dan Bartlett

Equipment: Celestron EdgeHD 14", ZWO ASI2600MC Pro

Integration: 2h 22m

Project Notes: Anti-solar-tail is the yellowish tail pointing towards the sun. A faint rich deep blue plasma tail, more evident on the starless versions can be also spied. Over two hours of integration time with waning crescent moon present. Measured magnitude 10.8. Pushed processing to show a very rich and dusty starfield. SPCC color calibrated however I pushed the saturation showing the…