In the 2012 Observer’s Handbook of the Royal Astronomical Society of Canada, meteor experts Margaret Campbell-Brown and Peter Brown, indicate that this year’s peak activity should occur on Saturday morning, Nov. 17, at about 3 a.m. ET (0800 GMT). This is the moment when the Earth will be passing closest to the orbit of the long-departed comet, and when our planet seemingly is most likely to encounter some residual comet material. This time is highly favorable for North Americans, especially those in the eastern United States and eastern Canada. [Top 10 Leonid Meteor Shower Facts]
But while Leonid rates are unpredictable, it is unlikely that more than 10 to 20 meteors per hour may be seen this year.
Other meteor researchers, however, such as Jeremie Vaubaillon of France, and Mikhail Maslovof Russia have examined Leonid prospects for this year and also suggest watching for some meteor activity three days later, on Tuesday morning, Nov. 20.
For example: Sometime around 1 a.m. EST (0600 GMT), the Earth may interact with material that was shed by comet Tempel-Tuttle back in the year 1400. But at best, only about 15 to20 Leonids per hour may be seen.