Wednesday, 5 November 2025

Fwd: Post Perihelion Data on 3I/ATLAS

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---------- Forwarded message ---------
From: Avi Loeb <subscriptions@medium.com>
Date: Wed, 5 Nov 2025 at 10:50
Subject: Post Perihelion Data on 3I/ATLAS
To: <zvagoman@gmail.com>


Reports from the Minor Planet Center (here) and the NASA's Jet Propulsion Laboratory (here) just released new data on the interstellar…

Post Perihelion Data on 3I/ATLAS

Avi Loeb
Avi Loeb
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November 5, 2025
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7 min read
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Trajectory of 3I/ATLAS with positions of it and the planets on November 5, 2025. (Credit: NASA/JPL)

Trajectory of 3I/ATLAS with positions of it and the planets on November 5, 2025. (Credit: NASA/JPL)

Reports from the Minor Planet Center (here) and the NASA's Jet Propulsion Laboratory (here) just released new data on the interstellar object 3I/ATLAS following its perihelion passage on October 29, 2025. The new data covers the period between October 31 and November 4.

When compared to previous data obtained on October 5–8, it appears that 3I/ATLAS brightened by a factor of ~5 in the Green-band which is centered at a wavelength of 0.464 micrometers.

The value of the non-gravitational acceleration was reduced by a third relative to the value reported on October 29. This reduction is within the uncertainties. The…

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