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Location: Santiago, Chile

The following ISS sightings are possible from Wednesday Apr 7, 2021 through Thursday Apr 22, 2021

Date Visible Max Height Appears Disappears Share Event
Fri Apr 9, 7:16 AM 6 min 34° 10° above SSW 10° above ENE  
Sat Apr 10, 6:30 AM 4 min 21° 15° above S 10° above E  
Sun Apr 11, 5:45 AM 1 min 14° 14° above SE 10° above ESE  
Sun Apr 11, 7:18 AM 7 min 65° 12° above SW 10° above NE  
Mon Apr 12, 5:33 AM 4 min 65° 50° above SSW 10° above NE  
Tue Apr 13, 4:49 AM 1 min 16° 16° above E 10° above ENE  
Tue Apr 13, 6:22 AM 4 min 17° 14° above W 10° above N  
Wed Apr 14, 5:37 AM 2 min 24° 24° above N 10° above NNE  
Thu Apr 15, 7:49 PM 1 min 21° 10° above NNW 21° above N  
Fri Apr 16, 7:03 PM 3 min 16° 10° above NNE 15° above ENE  
Fri Apr 16, 8:38 PM 1 min 15° 10° above WNW 15° above WNW  
Sat Apr 17, 7:51 PM 4 min 68° 10° above NW 65° above S  
Sun Apr 18, 7:03 PM 6 min 61° 10° above NW 17° above SE  
Sun Apr 18, 8:42 PM 1 min 12° 10° above WSW 12° above WSW  
Mon Apr 19, 7:54 PM 4 min 22° 10° above W 20° above S  
Tue Apr 20, 7:06 PM 6 min 36° 10° above WNW 10° above SSE  
Wed Apr 21, 7:59 PM 1 min 10° 10° above SSW 10° above SSW  
2021-04-09 10:16:00.0,Fri Apr 9, 7:16 AM,6 min,34°,10° above SSW,10° above ENE|2021-04-10 09:30:00.0,Sat Apr 10, 6:30 AM,4 min,21°,15° above S,10° above E|2021-04-11 08:45:00.0,Sun Apr 11, 5:45 AM,1 min,14°,14° above SE,10° above ESE|2021-04-11 10:18:00.0,Sun Apr 11, 7:18 AM,7 min,65°,12° above SW,10° above NE|2021-04-12 09:33:00.0,Mon Apr 12, 5:33 AM,4 min,65°,50° above SSW,10° above NE|2021-04-13 08:49:00.0,Tue Apr 13, 4:49 AM,1 min,16°,16° above E,10° above ENE|2021-04-13 10:22:00.0,Tue Apr 13, 6:22 AM,4 min,17°,14° above W,10° above N|2021-04-14 09:37:00.0,Wed Apr 14, 5:37 AM,2 min,24°,24° above N,10° above NNE|2021-04-15 23:49:00.0,Thu Apr 15, 7:49 PM,1 min,21°,10° above NNW,21° above N|2021-04-16 23:03:00.0,Fri Apr 16, 7:03 PM,3 min,16°,10° above NNE,15° above ENE|2021-04-17 00:38:00.0,Fri Apr 16, 8:38 PM,1 min,15°,10° above WNW,15° above WNW|2021-04-17 23:51:00.0,Sat Apr 17, 7:51 PM,4 min,68°,10° above NW,65° above S|2021-04-18 23:03:00.0,Sun Apr 18, 7:03 PM,6 min,61°,10° above NW,17° above SE|2021-04-19 00:42:00.0,Sun Apr 18, 8:42 PM,1 min,12°,10° above WSW,12° above WSW|2021-04-19 23:54:00.0,Mon Apr 19, 7:54 PM,4 min,22°,10° above W,20° above S|2021-04-20 23:06:00.0,Tue Apr 20, 7:06 PM,6 min,36°,10° above WNW,10° above SSE|2021-04-21 23:59:00.0,Wed Apr 21, 7:59 PM,1 min,10°,10° above SSW,10° above SSW|

What am I looking for in the sky?

The space station looks like an airplane or a very bright star moving across the sky, except it doesn't have flashing lights or change direction. It will also be moving considerably faster than a typical airplane (airplanes generally fly at about 600 miles per hour; the space station flies at 17,500 miles per hour).

Below is a time-lapse photo of the space station moving across the sky.

The International Space Station is seen in this 30 second exposure as it flies over Elkton, VA early in the morning, Saturday, August 1, 2015. Photo Credit: NASA/Bill Ingalls The International Space Station is seen in this 30 second exposure as it flies over Elkton, VA early in the morning, Saturday, August 1, 2015. Photo Credit: NASA/Bill Ingalls

Visit the NASA Johnson Flickr Photostream

How do I Spot The Station?

What does all this sighting information mean?

Time is when the sighting opportunity will begin in your local time zone. All sightings will occur within a few hours before or after sunrise or sunset. This is the optimum viewing period as the sun reflects off the space station and contrasts against the darker sky.

Visible is the maximum time period the space station is visible before crossing back below the horizon.

Max Height is measured in degrees (also known as elevation). It represents the height of the space station from the horizon in the night sky. The horizon is at zero degrees, and directly overhead is ninety degrees. If you hold your fist at arm's length and place your fist resting on the horizon, the top will be about 10 degrees.

Appears is the location in the sky where the station will be visible first. This value, like maximum height, also is measured in degrees from the horizon. The letters represent compass directions -- N is north, WNW is west by northwest, and so on.

Disappears represents where in the night sky the International Space Station will leave your field of view.

Astronomical Horizon chart. Click the link for a detailed description of the astronomical horizon and sighting alert messages.

National Aeronautics and Space Administration Page Editor: Bill Keeter NASA Official: Jacob Keaton