(meteorobs) 2012 Geminids

Skywayinc at aol.com Skywayinc at aol.com
Tue Dec 11 11:06:20 EST 2012


I for one am now a little confused concerning the  time of peak activity 
for the 2012 Geminids.  
 
Although most sites are promoting 0 hours on December 14  as the peak for 
this year's display, this plot by Jeremie Vaubaillion clearly  shows that the 
best interaction between Earth and material shed by 3200 Phaethon  occurs 
about 24-hour later . . . at around 0 hours on December 15.
 
See: 
_http://www.imcce.fr/langues/en/ephemerides/phenomenes/meteor/DATABASE/Geminids/BIN-tout/Noeuds-Earth2012.jpg_ 
(http://www.imcce.fr/langues/en/ephemerides/phenomenes/meteor/DATABASE/Geminids/BIN-tout/Noeuds-Earth2012.jpg) 
 
Perhaps Jeremie can explain the discrepancy between his  plot and the other 
forecasts for peak activity?
 
We know, for instance, that the brighter Geminids come  after the peak . . 
. so perhaps what Jeremie's plot is showing are the larger  
particles/nuggets that lead to a greater preponderance of brighter meteors . . .  though not 
necessarily higher ZHRs?  
 
This is just a guess on my part . . . 
-- joe rao
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