[Iaude] CBET 4961: (15107) TOEPPERWEIN

quai at eps.harvard.edu quai at eps.harvard.edu
Sat May 8 19:39:56 EDT 2021

                                                  Electronic Telegram No. 4961
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau at eps.harvard.edu (alternate cbat at iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network

     P. Pravec, P. Kusnirak, K. Hornoch, P. Fatka, and H. Kucakova, Ondrejov
Observatory and European Southern Observatory, La Silla, report that
photometric observations obtained with a 1.54-m reflector at the La Silla
observatory during Mar. 10-May 5 reveal that minor planet (15107) is a binary
system with an orbital period of 19.602 +/- 0.006 hr.  The primary shows a
period of 2.5327 +/- 0.0001 hr and has a lightcurve amplitude of 0.12 mag at
solar phases 8-24 degrees, suggesting a nearly spheroidal shape.  Mutual
eclipse/occultation events that are 0.04 magnitude deep indicate a lower limit
on the secondary-to-primary mean-diameter ratio of 0.19.  The mean absolute
magnitude of the system is H = 14.82 +/- 0.02 with phase-relation slope
parameter G = 0.28 +/- 0.02.  These observations were run as a part of their
photometric project "NEOSource" within its task to study binary and multiple
systems among minor-planet pairs [i.e., pairs of minor planets that are in
highly similar heliocentric orbits (see Vokrouhlicky and Nesvorny 2008, A.J.
136, 280; Pravec et al. 2010, Nature 466, 1085)].  Minor planet (15107) was
selected as a target as it was found that it appears paired with minor planet
(291188) 2006 AL_54 (see Pravec et al. 2019, Icarus 333, 429).

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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2021 CBAT
2021 May 8                       (CBET 4961)              Daniel W. E. Green

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