How many rotations does the ISS make per day around Earth? Does the number change?

– Xochielt Sanchez #xochielt

Answer by Clayton C. Anderson:

The International Space Station (ISS) flies around the earth in a near circular orbit.  The current altitude for that orbit is somewhere around 250 nautical miles.  Given that altitude, the period, or time for one orbit is approximately 90 minutes.  With a 90 minute orbit and a 24 hour day, the ISS will circle the Earth 16 times a day.  That's 16 sunrises and 16 sunsets each orbital day.  Makes for some great picture taking opportunities!
 

Keep lookin' up… you might see ISS somewhere in her 90 minute orbit!

How many rotations does the ISS make per day around Earth? Does the number change?

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