[IAUC] CBET 1383: 20080523 : 2005 NB_7

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                                                  Electronic Telegram No. 1383
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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2005 NB_7
     P. Kusnirak and P. Pravec, Ondrejov Observatory; A. Galad and L. Kornos,
Modra Observatory; and W. Cooney, J. Gross, and D. Terrell, Sonoita Research
Observatory, Sonoita, AZ, U.S.A., report that photometric observations
obtained during Apr. 30-May 11 reveal the following information for the
binary minor planet 2005 NB_7 (cf. IAUC 8936):  orbital period = 15.28 +/-
0.01 hr (same as the secondary's rotation period); primary's rotation period
= 3.4883 +/- 0.0002 hr; primary's lightcurve amplitude = 0.13 mag, suggesting
a nearly spheroidal shape; secondary's lightcurve amplitude = 0.09 mag; lower
limit on the secondary-to-primary mean-diameter ratio = 0.32.


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                         (C) Copyright 2008 CBAT
2008 May 23                      (CBET 1383)              Daniel W. E. Green