Electronic Telegram No. 5525
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
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Prepared using the Tamkin Foundation Computer Network


(2635) HUGGINS
     V. Benishek, Belgrade Astronomical Observatory; P. Pravec, Ondrejov
Observatory; M. Conjat, Observatoire de la Cote d'Azur, Nice, France; and
N. Ruocco, Sorrento, Italy, report that photometric observations taken with a
0.35-m telescope at the Sopot Observatory in Serbia, a 0.40-m telescope at
the Nice Observatory, and a 0.35-m telescope at Osservatorio Astronomico
Nastro Verde in Italy during 2024 Dec. 28-2025 Feb. 6 reveal that minor planet
(2635) is a binary system with an orbital period of 19.58 +/- 0.01 hr.  The
primary shows a period of 3.1326 +/- 0.0008 hr and has a lightcurve amplitude
of 0.13 magnitude at solar phase 2 degrees, suggesting a nearly spheroidal
shape.  Mutual eclipse/occultation events that are 0.10 magnitude deep
indicate a lower limit on the secondary-to-primary mean-diameter ratio of 0.31.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2025 CBAT
2025 March 12                    (CBET 5525)              Daniel W. E. Green