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Location: Calgary, Alberta, Canada

The following ISS sightings are possible from Friday May 14, 2021 through Saturday May 29, 2021

Date Visible Max Height Appears Disappears Share Event
Fri May 14, 10:35 PM 5 min 19° 10° above S 10° above E  
Sat May 15, 12:11 AM 7 min 67° 10° above WSW 10° above E  
Sat May 15, 1:47 AM 7 min 79° 10° above W 10° above E  
Sat May 15, 3:24 AM 7 min 58° 10° above W 10° above ESE  
Sat May 15, 11:23 PM 7 min 51° 10° above SW 10° above E  
Sun May 16, 1:00 AM 7 min 80° 10° above W 10° above E  
Sun May 16, 2:37 AM 7 min 74° 10° above W 10° above ESE  
Sun May 16, 4:14 AM 5 min 22° 10° above W 10° above SSE  
Sun May 16, 10:36 PM 6 min 38° 10° above SW 10° above E  
Mon May 17, 12:12 AM 7 min 86° 10° above W 10° above E  
Mon May 17, 1:49 AM 5 min 88° 10° above W 23° above ESE  
Mon May 17, 3:26 AM 1 min 19° 10° above W 19° above W  
Mon May 17, 11:25 PM 7 min 83° 10° above WSW 10° above E  
Tue May 18, 1:02 AM 5 min 83° 10° above W 23° above E  
Tue May 18, 2:39 AM 1 min 23° 10° above W 23° above W  
Tue May 18, 10:38 PM 7 min 67° 10° above WSW 10° above E  
Wed May 19, 12:14 AM 6 min 79° 10° above W 13° above E  
Wed May 19, 1:51 AM 3 min 42° 10° above W 42° above WSW  
Wed May 19, 11:27 PM 7 min 80° 10° above W 10° above E  
Thu May 20, 1:04 AM 4 min 74° 10° above W 59° above SE  
Thu May 20, 10:39 PM 7 min 86° 10° above W 10° above E  
Fri May 21, 12:16 AM 5 min 88° 10° above W 26° above ESE  
Fri May 21, 1:53 AM 1 min 19° 10° above W 19° above W  
Fri May 21, 11:29 PM 7 min 83° 10° above W 11° above E  
Sat May 22, 1:06 AM 3 min 40° 10° above W 40° above SW  
Sat May 22, 10:42 PM 7 min 79° 10° above W 10° above E  
Sun May 23, 12:18 AM 4 min 57° 10° above W 44° above SSE  
Sun May 23, 11:31 PM 6 min 73° 10° above W 19° above ESE  
Mon May 24, 1:08 AM 1 min 18° 10° above W 18° above WSW  
Mon May 24, 10:44 PM 7 min 87° 10° above W 10° above ESE  
Tue May 25, 12:21 AM 3 min 31° 10° above W 30° above SSW  
Tue May 25, 11:33 PM 5 min 42° 10° above W 25° above SSE  
Wed May 26, 10:46 PM 6 min 57° 10° above W 12° above ESE  
Thu May 27, 12:23 AM 2 min 15° 10° above WSW 15° above SW  
Thu May 27, 11:36 PM 4 min 22° 10° above W 18° above S  
Fri May 28, 10:48 PM 6 min 30° 10° above W 12° above SSE  
2021-05-15 04:35:00.0,Fri May 14, 10:35 PM,5 min,19°,10° above S,10° above E|2021-05-15 06:11:00.0,Sat May 15, 12:11 AM,7 min,67°,10° above WSW,10° above E|2021-05-15 07:47:00.0,Sat May 15, 1:47 AM,7 min,79°,10° above W,10° above E|2021-05-15 09:24:00.0,Sat May 15, 3:24 AM,7 min,58°,10° above W,10° above ESE|2021-05-16 05:23:00.0,Sat May 15, 11:23 PM,7 min,51°,10° above SW,10° above E|2021-05-16 07:00:00.0,Sun May 16, 1:00 AM,7 min,80°,10° above W,10° above E|2021-05-16 08:37:00.0,Sun May 16, 2:37 AM,7 min,74°,10° above W,10° above ESE|2021-05-16 10:14:00.0,Sun May 16, 4:14 AM,5 min,22°,10° above W,10° above SSE|2021-05-17 04:36:00.0,Sun May 16, 10:36 PM,6 min,38°,10° above SW,10° above E|2021-05-17 06:12:00.0,Mon May 17, 12:12 AM,7 min,86°,10° above W,10° above E|2021-05-17 07:49:00.0,Mon May 17, 1:49 AM,5 min,88°,10° above W,23° above ESE|2021-05-17 09:26:00.0,Mon May 17, 3:26 AM,1 min,19°,10° above W,19° above W|2021-05-18 05:25:00.0,Mon May 17, 11:25 PM,7 min,83°,10° above WSW,10° above E|2021-05-18 07:02:00.0,Tue May 18, 1:02 AM,5 min,83°,10° above W,23° above E|2021-05-18 08:39:00.0,Tue May 18, 2:39 AM,1 min,23°,10° above W,23° above W|2021-05-19 04:38:00.0,Tue May 18, 10:38 PM,7 min,67°,10° above WSW,10° above E|2021-05-19 06:14:00.0,Wed May 19, 12:14 AM,6 min,79°,10° above W,13° above E|2021-05-19 07:51:00.0,Wed May 19, 1:51 AM,3 min,42°,10° above W,42° above WSW|2021-05-20 05:27:00.0,Wed May 19, 11:27 PM,7 min,80°,10° above W,10° above E|2021-05-20 07:04:00.0,Thu May 20, 1:04 AM,4 min,74°,10° above W,59° above SE|2021-05-21 04:39:00.0,Thu May 20, 10:39 PM,7 min,86°,10° above W,10° above E|2021-05-21 06:16:00.0,Fri May 21, 12:16 AM,5 min,88°,10° above W,26° above ESE|2021-05-21 07:53:00.0,Fri May 21, 1:53 AM,1 min,19°,10° above W,19° above W|2021-05-22 05:29:00.0,Fri May 21, 11:29 PM,7 min,83°,10° above W,11° above E|2021-05-22 07:06:00.0,Sat May 22, 1:06 AM,3 min,40°,10° above W,40° above SW|2021-05-23 04:42:00.0,Sat May 22, 10:42 PM,7 min,79°,10° above W,10° above E|2021-05-23 06:18:00.0,Sun May 23, 12:18 AM,4 min,57°,10° above W,44° above SSE|2021-05-24 05:31:00.0,Sun May 23, 11:31 PM,6 min,73°,10° above W,19° above ESE|2021-05-24 07:08:00.0,Mon May 24, 1:08 AM,1 min,18°,10° above W,18° above WSW|2021-05-25 04:44:00.0,Mon May 24, 10:44 PM,7 min,87°,10° above W,10° above ESE|2021-05-25 06:21:00.0,Tue May 25, 12:21 AM,3 min,31°,10° above W,30° above SSW|2021-05-26 05:33:00.0,Tue May 25, 11:33 PM,5 min,42°,10° above W,25° above SSE|2021-05-27 04:46:00.0,Wed May 26, 10:46 PM,6 min,57°,10° above W,12° above ESE|2021-05-27 06:23:00.0,Thu May 27, 12:23 AM,2 min,15°,10° above WSW,15° above SW|2021-05-28 05:36:00.0,Thu May 27, 11:36 PM,4 min,22°,10° above W,18° above S|2021-05-29 04:48:00.0,Fri May 28, 10:48 PM,6 min,30°,10° above W,12° above SSE|

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