Electronic Telegram No. 5303
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
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Prepared using the Tamkin Foundation Computer Network


(48470) 1991 TC_2
     B. D. Warner, Center for Solar System Studies, Landers, CA, U.S.A, repors
that photometric observations taken with a 0.35-m telescope at the Center for
Solar System Studies from 2023 Sept. 28 through Oct. 9 reveal that the
Hungaria-group minor planet (48470) is a binary system with an orbital period
of 11.179 +/- 0.004 hours.  The primary shows a period of 2.5141 +/- 0.0002
hours and an asymmetrical (different minimum depths) bi-modal lightcurve with
a maximum peak-to-peak amplitude of 0.11 mag at solar phase angles 13-6 deg.
Mutual eclipse/occultation events that are 0.08 to 0.09 magnitudes deep
indicate a lower limit of 0.28 +/- 0.02 for the secondary-to-primary mean-
diameter ratio.  Lightcurves are available at the following website URL:
http://www.planetarysciences.org/plots/BDW/48470_1991TC2_20230926.PNG.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2023 CBAT
2023 October 18                  (CBET 5303)              Daniel W. E. Green