Exploiting the unusual good weather of this season, we imaged the interstellar comet 3I/ATLAS (C/2025 N1 ATLAS) again, recording a much more developed ion tail.
The interstellar comet 3I/ATLAS, imaged on 11 Nov. 2025.
The image above comes from the sigma-clipping combination of 18, 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 14 deg. above the easter horizon, with a bright (phase: 61%) Moon at about 70 degrees from it.
Looking at the picture, we see how the ion tail of 3I/ATLAS is clearly showing better and better, thanks to the improving perspective. We could see it spanning at least 0.7 degrees, in the NE direction. It is also well visible the anti-tail, pointing to ESE.
We will continue to monitor this exceptional object.
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