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Location: Watertown, South Dakota, United States

The following ISS sightings are possible from Friday Sep 14, 2018 through Sunday Sep 30, 2018

Date Visible Max Height Appears Disappears Share Event
Sat Sep 15, 4:11 AM < 1 min 13° 13° above ENE 11° above ENE  
Sat Sep 15, 5:44 AM 5 min 80° 23° above WNW 11° above SE  
Sun Sep 16, 4:55 AM 2 min 35° 35° above E 10° above ESE  
Sun Sep 16, 6:28 AM 5 min 20° 10° above W 11° above S  
Mon Sep 17, 5:38 AM 3 min 35° 35° above SSW 10° above SSE  
Thu Sep 20, 9:17 PM < 1 min 12° 10° above SSW 12° above SSW  
Fri Sep 21, 8:26 PM 2 min 16° 10° above S 16° above SE  
Fri Sep 21, 10:01 PM < 1 min 10° 10° above WSW 10° above WSW  
Sat Sep 22, 9:09 PM 3 min 53° 10° above SW 53° above SSW  
Sun Sep 23, 8:17 PM 5 min 35° 10° above SSW 17° above E  
Sun Sep 23, 9:53 PM 1 min 20° 10° above W 20° above W  
Mon Sep 24, 9:01 PM 4 min 62° 10° above WSW 44° above NNE  
Tue Sep 25, 8:09 PM 6 min 79° 10° above SW 11° above ENE  
Tue Sep 25, 9:48 PM < 1 min 24° 21° above NW 24° above NW  
Wed Sep 26, 8:56 PM 2 min 37° 27° above WNW 26° above NNE  
Thu Sep 27, 8:04 PM 4 min 52° 38° above WNW 10° above NE  
Thu Sep 27, 9:40 PM < 1 min 21° 17° above NW 21° above NNW  
Fri Sep 28, 8:49 PM 3 min 27° 20° above NW 20° above NNE  
2018-09-15 09:11:00.0,Sat Sep 15, 4:11 AM,< 1 min,13°,13° above ENE,11° above ENE|2018-09-15 10:44:00.0,Sat Sep 15, 5:44 AM,5 min,80°,23° above WNW,11° above SE|2018-09-16 09:55:00.0,Sun Sep 16, 4:55 AM,2 min,35°,35° above E,10° above ESE|2018-09-16 11:28:00.0,Sun Sep 16, 6:28 AM,5 min,20°,10° above W,11° above S|2018-09-17 10:38:00.0,Mon Sep 17, 5:38 AM,3 min,35°,35° above SSW,10° above SSE|2018-09-21 02:17:00.0,Thu Sep 20, 9:17 PM,< 1 min,12°,10° above SSW,12° above SSW|2018-09-22 01:26:00.0,Fri Sep 21, 8:26 PM,2 min,16°,10° above S,16° above SE|2018-09-22 03:01:00.0,Fri Sep 21, 10:01 PM,< 1 min,10°,10° above WSW,10° above WSW|2018-09-23 02:09:00.0,Sat Sep 22, 9:09 PM,3 min,53°,10° above SW,53° above SSW|2018-09-24 01:17:00.0,Sun Sep 23, 8:17 PM,5 min,35°,10° above SSW,17° above E|2018-09-24 02:53:00.0,Sun Sep 23, 9:53 PM,1 min,20°,10° above W,20° above W|2018-09-25 02:01:00.0,Mon Sep 24, 9:01 PM,4 min,62°,10° above WSW,44° above NNE|2018-09-26 01:09:00.0,Tue Sep 25, 8:09 PM,6 min,79°,10° above SW,11° above ENE|2018-09-26 02:48:00.0,Tue Sep 25, 9:48 PM,< 1 min,24°,21° above NW,24° above NW|2018-09-27 01:56:00.0,Wed Sep 26, 8:56 PM,2 min,37°,27° above WNW,26° above NNE|2018-09-28 01:04:00.0,Thu Sep 27, 8:04 PM,4 min,52°,38° above WNW,10° above NE|2018-09-28 02:40:00.0,Thu Sep 27, 9:40 PM,< 1 min,21°,17° above NW,21° above NNW|2018-09-29 01:49:00.0,Fri Sep 28, 8:49 PM,3 min,27°,20° above NW,20° above NNE|

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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