Electronic Telegram No. 5625
Central Bureau for Astronomical Telegrams
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COMET 3I/ATLAS
     J. Crovisier, N. Biver, and D. Bockelee-Morvan, LIRA, Observatoire de
Paris, PSL University, report observations of the 18-cm line of OH in comet
3I/ATLAS with the Nancay radio telescope.  From co-added observations obtained
during Oct. 13-19, the 1667-MHz OH line intensity was 74 +/- 7 mJy*km/s,
corresponding to a production rate Q[OH] = 5.7 +/- 0.6 10**28 molecules/s,
assuming a standard Haser model with an inversion of 0.50 for the OH doublet
ground state.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2025 CBAT
2025 October 21                  (CBET 5625)              Daniel W. E. Green