Electronic Telegram No. 1453 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) CBAT@CFA.HARVARD.EDU (science) URL http://www.cfa.harvard.edu/iau/cbat.html 2008 ED_69 AND KAPPA CYGNIDS P. Jenniskens, SETI Institute, suggests that the steeply inclined (i = 36.3 deg) and intrinsically bright (H = 16.7) minor planet 2008 ED_69 (cf. MPECs 2008-E105, 2008-F11) is likely a fragment that remained after formation of the kappa Cygnids (IAU shower 12), known from its common bright meteors seen in August. J. Vaubaillon (California Institute of Technology) has developed a meteoroid-stream model with ejecting dust in 4000 BC, 2000 BC, and 1 AD from the backward-integrated 38-day orbit of 2008 ED_69, demonstrating that the dispersion of particles in earth orbit is in good agreement with observations if the stream was formed around 4000-1600 BC (Jenniskens and Vaubaillon 2008, A.J. 136, 725). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2008 CBAT 2008 July 29 (CBET 1453) Daniel W. E. Green