[amsat-bb] future apogee calculation

[Bob- W7LRD]

Hello 

Is there a "easy" way of figuring out where/when a given apogee will at a given lat.long?  I want to try to predetermine when the apogee will be on AO-7 to favor the northern hemisphere.  To "maybe" help in dx contacts.  The difference is only bout 17km in altitude, it just might streeeetch the footprint enough.  Also just how much does the 17km add to the footprint?  

73 Bob W7LRD