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George:

Thanks for the information.
>
> My tongue was slightly in my cheek, but my point was I might have to wait 
some time for one of the Moons to be in position, but our moon occults a star 
much more frequently.  I spent about 2 hours watching Jupiter last summer, 
and could't really tell which moon was which. I suppose the best way to go 
about it is to have a list of the events and then you will know what moon is 
occulting. My 4.5 inch reflector gives quite a good image, but I need much 
more practice.
>   

> In [7265], Bruce asked- "Has anyone had any luck putting the concept into 
> practice?"  I was wondering to what extent ocultaion of stars by our moon 
was used, but it's nice to know that the Jupiter method was well used. I have 
read here that navigators of old would use any handy bit of land to plop a 
telescope on and get a good longitude fix by Jupiter's moons.
>   
Working out an occultation of a star by our moon by longhand looks a tad 
intimidating, but in these days of java aplets and spreadsheets, I 
wonder if it could be easily put into practice.

Thanks again.


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