Interstellar comet 3I/ATLAS (aka C/2025 N1 ATLAS): a new image with tail – 10 Nov. 2025.
While observing conditions improve, we spotted again the interstellar comet 3I/ATLAS (C/2025 N1 ATLAS), detecting the complex signature of its ion tail.
The interstellar comet 3I/ATLAS, imaged on 10 Nov. 2025.
The image above comes from the sigma-clipping combination of 14, 120-second exposures, remotely taken with the ARTEC250+Paramount ME+C3Pro61000EC robotic unit available as part of the Virtual Telescope Project facility in Manciano, Italy. The comet was 12 deg. above the easter horizon, with a bright (phase: 71%) Moon at about 85 degrees from it.
Despite that, we clearly detected the ion tail of 3I/ATLAS, thanks to the evolving geometry. Now that the comet is moving into the morning sky, its tail – which was behind the nucleus as seen from the Earth at perihelion, so difficult to see in the past days – is better and better visible.
We will continue to monitor this exceptional object.
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