June Bootids 2016: prediction of activity
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Fig. 1. Space-temporal projection of June Bootid trails parts onto their minimal distance passages in 2016 (correspondence between colours of the particles and their ejection velocities can be seen here).
In 2016 the Earth passes at 0.00123 AU from 1921 trail. Very high ejection velocity of trail particles (97.06 m/c) virtually excludes any perspectives of visual activity, however in radiorange small particles could give a notable inctrease of activity. Computed time of maximum is 0:08 UT on June 23, theoretical radiant: RA=203.0°, Dec=+51.7°, Vg=19.3 km/s.
1. "Comet's dust 2.0" program by S. Shanov and S. Dubrovsky. [Used for orbital computations.]
2. Lyytinen E, van Flandern T. "Predicting the strength of Leonid outbursts", 2000, Icarus, P. 158-160.
3. Kasuo Kinoshita, http://jcometobs.web.fc2.com/ [Orbital elements of the comet 7P Pons-Winnecke]