(meteorobs) Meteoroid streams and the Moon

[Chris Steyaert]

  David, All,


>I favour the second answer, but am not sure...

Me too ;-)

The geocentric velocity (speed and radiant position) is the vector 
sum of velocity of the Earth and that of the stream. Also to be 
considered is the travel time of the meteoroids from the distance of 
the Moon to the Earth (magnitude of an hour).

The question could be put differently: does the Moon occasionally 
shield places on Earth from a stream? I think it can: a bit like the 
the path of a total solar eclipse moving over the Earth.



         Regards,

         Chris



At 10:53 30/11/2008, David Entwistle wrote:
>Following up on a question from 2006 09 22...
>
>On 14th December 2008 the almost full Moon will pass within a few
>degrees of the active Geminid radiant. Does this mean that the Geminid
>meteoroids that reach Earth, as visible meteors, have passed through the
>vicinity of the Moon on their way here?  Or, is the alignment of the
>Moon and radiant just an optical effect and the meteoroids don't get
>anywhere near the Moon, on their way to Earth?
>
>I favour the second answer, but am not sure...
>--
>David Entwistle