Electronic Telegram No. 4259 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) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network POSSIBLE METEOR ACTIVITY FROM COMET P/2016 BA14 Further to CBET 4257, comet P/2016 BA14 will pass within about 0.024 AU of the earth on Mar. 23, and comet 252P will pass about 0.0357 AU from the earth on Mar. 21-22. Assuming no unusual brightness variations, each object may approach total visual magnitude 12 around closest approach. G. V. Williams notes that the closest approach of comet 252P to Jupiter since 1899 was in 1987 at a distance of 0.26 AU. Quan-Zhi Ye, Department of Physics and Astronomy, University of Western Ontario, writes that, with the help of a meteoroid trail model, the evolution of possible meteoroids ejected from P/2016 BA14 since 1750 AD has been examined, but no trail encounter is found for 2016. However, it is possible that older meteoroid trails from this object are still capable of producing meteor activity, so observers should be on alert. Possible meteors would radiate from geocentric radiant R.A. = 5h.5 (82 deg), Decl. = -39 deg (equinox J2000.0), with geocentric velocity 14.1 km/s. The most probable time for meteor activity would be around the late hours of 2016 Mar. 20 UT. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2016 CBAT 2016 February 16 (CBET 4259) Daniel W. E. Green