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Location: Chelmsford, England, United Kingdom

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, 9:51 PM 4 min 14° 10° above S 10° above ESE  
Fri May 14, 11:26 PM 7 min 51° 10° above SW 10° above E  
Sat May 15, 1:02 AM 7 min 89° 10° above W 10° above E  
Sat May 15, 2:39 AM 7 min 59° 10° above W 10° above ESE  
Sat May 15, 4:16 AM 5 min 18° 10° above W 10° above S  
Sat May 15, 10:38 PM 6 min 38° 10° above SW 10° above E  
Sun May 16, 12:15 AM 7 min 87° 10° above W 10° above E  
Sun May 16, 1:52 AM 7 min 73° 10° above W 10° above ESE  
Sun May 16, 3:29 AM 6 min 25° 10° above W 10° above SSE  
Sun May 16, 9:51 PM 6 min 28° 10° above SSW 10° above E  
Sun May 16, 11:27 PM 7 min 78° 10° above WSW 10° above E  
Mon May 17, 1:04 AM 7 min 84° 10° above W 10° above E  
Mon May 17, 2:41 AM 6 min 34° 10° above W 10° above SE  
Mon May 17, 10:40 PM 7 min 65° 10° above WSW 10° above E  
Tue May 18, 12:17 AM 6 min 90° 10° above W 15° above E  
Tue May 18, 1:54 AM 2 min 30° 10° above W 30° above WSW  
Tue May 18, 9:53 PM 7 min 51° 10° above SW 10° above E  
Tue May 18, 11:29 PM 7 min 89° 10° above W 10° above E  
Wed May 19, 1:06 AM 3 min 55° 10° above W 55° above SW  
Wed May 19, 10:42 PM 7 min 87° 10° above W 10° above E  
Thu May 20, 12:19 AM 4 min 73° 10° above W 42° above ESE  
Thu May 20, 1:56 AM < 1 min 11° 10° above W 11° above W  
Thu May 20, 9:54 PM 7 min 78° 10° above WSW 10° above E  
Thu May 20, 11:31 PM 6 min 83° 10° above W 20° above ESE  
Fri May 21, 1:08 AM 2 min 24° 10° above W 24° above WSW  
Fri May 21, 10:44 PM 7 min 90° 10° above W 10° above E  
Sat May 22, 12:21 AM 3 min 45° 10° above W 45° above SSW  
Sat May 22, 9:56 PM 7 min 89° 10° above W 10° above E  
Sat May 22, 11:33 PM 5 min 59° 10° above W 33° above SE  
Sun May 23, 1:11 AM < 1 min 11° 10° above W 11° above WSW  
Sun May 23, 10:46 PM 6 min 72° 10° above W 15° above ESE  
Mon May 24, 12:23 AM 2 min 22° 10° above W 22° above WSW  
Mon May 24, 9:59 PM 7 min 83° 10° above W 10° above ESE  
Mon May 24, 11:35 PM 4 min 34° 10° above W 32° above S  
Tue May 25, 10:48 PM 5 min 45° 10° above W 20° above SE  
Wed May 26, 12:26 AM < 1 min 11° 10° above WSW 11° above WSW  
Wed May 26, 10:01 PM 7 min 58° 10° above W 10° above ESE  
Wed May 26, 11:38 PM 3 min 18° 10° above W 18° above SSW  
Thu May 27, 10:50 PM 4 min 24° 10° above W 18° above S  
Fri May 28, 10:03 PM 6 min 33° 10° above W 10° above SE  
2021-05-14 20:51:00.0,Fri May 14, 9:51 PM,4 min,14°,10° above S,10° above ESE|2021-05-14 22:26:00.0,Fri May 14, 11:26 PM,7 min,51°,10° above SW,10° above E|2021-05-15 00:02:00.0,Sat May 15, 1:02 AM,7 min,89°,10° above W,10° above E|2021-05-15 01:39:00.0,Sat May 15, 2:39 AM,7 min,59°,10° above W,10° above ESE|2021-05-15 03:16:00.0,Sat May 15, 4:16 AM,5 min,18°,10° above W,10° above S|2021-05-15 21:38:00.0,Sat May 15, 10:38 PM,6 min,38°,10° above SW,10° above E|2021-05-15 23:15:00.0,Sun May 16, 12:15 AM,7 min,87°,10° above W,10° above E|2021-05-16 00:52:00.0,Sun May 16, 1:52 AM,7 min,73°,10° above W,10° above ESE|2021-05-16 02:29:00.0,Sun May 16, 3:29 AM,6 min,25°,10° above W,10° above SSE|2021-05-16 20:51:00.0,Sun May 16, 9:51 PM,6 min,28°,10° above SSW,10° above E|2021-05-16 22:27:00.0,Sun May 16, 11:27 PM,7 min,78°,10° above WSW,10° above E|2021-05-17 00:04:00.0,Mon May 17, 1:04 AM,7 min,84°,10° above W,10° above E|2021-05-17 01:41:00.0,Mon May 17, 2:41 AM,6 min,34°,10° above W,10° above SE|2021-05-17 21:40:00.0,Mon May 17, 10:40 PM,7 min,65°,10° above WSW,10° above E|2021-05-17 23:17:00.0,Tue May 18, 12:17 AM,6 min,90°,10° above W,15° above E|2021-05-18 00:54:00.0,Tue May 18, 1:54 AM,2 min,30°,10° above W,30° above WSW|2021-05-18 20:53:00.0,Tue May 18, 9:53 PM,7 min,51°,10° above SW,10° above E|2021-05-18 22:29:00.0,Tue May 18, 11:29 PM,7 min,89°,10° above W,10° above E|2021-05-19 00:06:00.0,Wed May 19, 1:06 AM,3 min,55°,10° above W,55° above SW|2021-05-19 21:42:00.0,Wed May 19, 10:42 PM,7 min,87°,10° above W,10° above E|2021-05-19 23:19:00.0,Thu May 20, 12:19 AM,4 min,73°,10° above W,42° above ESE|2021-05-20 00:56:00.0,Thu May 20, 1:56 AM,< 1 min,11°,10° above W,11° above W|2021-05-20 20:54:00.0,Thu May 20, 9:54 PM,7 min,78°,10° above WSW,10° above E|2021-05-20 22:31:00.0,Thu May 20, 11:31 PM,6 min,83°,10° above W,20° above ESE|2021-05-21 00:08:00.0,Fri May 21, 1:08 AM,2 min,24°,10° above W,24° above WSW|2021-05-21 21:44:00.0,Fri May 21, 10:44 PM,7 min,90°,10° above W,10° above E|2021-05-21 23:21:00.0,Sat May 22, 12:21 AM,3 min,45°,10° above W,45° above SSW|2021-05-22 20:56:00.0,Sat May 22, 9:56 PM,7 min,89°,10° above W,10° above E|2021-05-22 22:33:00.0,Sat May 22, 11:33 PM,5 min,59°,10° above W,33° above SE|2021-05-23 00:11:00.0,Sun May 23, 1:11 AM,< 1 min,11°,10° above W,11° above WSW|2021-05-23 21:46:00.0,Sun May 23, 10:46 PM,6 min,72°,10° above W,15° above ESE|2021-05-23 23:23:00.0,Mon May 24, 12:23 AM,2 min,22°,10° above W,22° above WSW|2021-05-24 20:59:00.0,Mon May 24, 9:59 PM,7 min,83°,10° above W,10° above ESE|2021-05-24 22:35:00.0,Mon May 24, 11:35 PM,4 min,34°,10° above W,32° above S|2021-05-25 21:48:00.0,Tue May 25, 10:48 PM,5 min,45°,10° above W,20° above SE|2021-05-25 23:26:00.0,Wed May 26, 12:26 AM,< 1 min,11°,10° above WSW,11° above WSW|2021-05-26 21:01:00.0,Wed May 26, 10:01 PM,7 min,58°,10° above W,10° above ESE|2021-05-26 22:38:00.0,Wed May 26, 11:38 PM,3 min,18°,10° above W,18° above SSW|2021-05-27 21:50:00.0,Thu May 27, 10:50 PM,4 min,24°,10° above W,18° above S|2021-05-28 21:03:00.0,Fri May 28, 10:03 PM,6 min,33°,10° above W,10° above SE|

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