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ISS Sightings

Current Position of 
International Space Station (ISS) 

ISS height as it varies over time

This plot shows the orbital height of the ISS over the last year. Clearly visible are the re-boosts which suddenly increase the height, and the gradual decay in between. The height is averaged over one orbit, and the gradual decrease is caused by atmospheric drag. As can be seen from the plot, the rate of descent is not constant and this variation is caused by changes in the density of the tenuous outer atmosphere due mainly to solar activity. Source Heavens Above.





Below are upcoming viewing times for the ISS (International Space Station).








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