ILW Bulletin 9: Results of the 1996 Leonid Maximum

Details ILW Bulletin 9: Results of the 1996 Leonid Maximum ILW Bulletin 9: Results of the 1996 Leonid Maximum

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jimo...24..203a&link_type=abstract

WGN, Journal of the International Meteor Organization, vol. 24, no. 6, p. 203-206

Computer Science

4

Scientific paper

The activity profile for the 1996 Leonids derived from 114 observations comprising 1920 shower meteors is given. A double maximum may be recognized in the ZHR-profile occurring at lambda=235.15 degrees (eq. 2000.0) and lambda=235.37 degrees with a maximum ZHR of 46+-4. The population index drops to r=1.66+-0.03 in the period lambda=235.30 - 235.40 degrees contemporaneously with the second maximum. The shower profile is 0.5 degrees wide and rich in large meteoroids around the nodal crossing as evidenced by the low value of r in this region. It is suggested that this portion of the profile consists of older material and that if any significant amount of "fresh" cometary ejecta is currently present in the stream it is located before the nodal crossing, but does not dominate the profile. If material prior to the nodal crossing (slightly higher r values observed during the first maximum) is associated with more recent ejecta, this might be an early precursor to the meteoroids associated with any meteor storm in 1998 or 1999.

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