Skip to main content

Sighting Location

Select Location

Location: Portsmouth, England, United Kingdom

The following ISS sightings are possible from Monday Nov 29, 2021 through Friday Dec 17, 2021

Date Visible Max Height Appears Disappears Share Event
Wed Dec 1, 5:42 PM 5 min 84° 10° above W 36° above E  
Wed Dec 1, 7:19 PM 1 min 15° 10° above W 15° above W  
Thu Dec 2, 4:55 PM 7 min 77° 10° above W 9° above E  
Thu Dec 2, 6:32 PM 3 min 48° 10° above W 48° above SW  
Fri Dec 3, 5:45 PM 5 min 66° 10° above WNW 26° above ESE  
Fri Dec 3, 7:22 PM 1 min 13° 10° above W 13° above WSW  
Sat Dec 4, 4:58 PM 7 min 83° 10° above WNW 10° above ESE  
Sat Dec 4, 6:35 PM 3 min 26° 10° above W 26° above SSW  
Sun Dec 5, 5:47 PM 6 min 36° 10° above W 13° above SE  
Mon Dec 6, 5:00 PM 7 min 49° 10° above W 10° above SE  
Mon Dec 6, 6:38 PM 3 min 12° 10° above WSW 10° above SSW  
Tue Dec 7, 5:50 PM 5 min 18° 10° above W 10° above S  
Wed Dec 8, 5:03 PM 6 min 25° 10° above W 10° above SSE  
Fri Dec 10, 5:06 PM 3 min 12° 10° above WSW 10° above SSW  

The following Cygnus sightings are possible from Monday Nov 29, 2021 through Friday Dec 17, 2021

Date Visible Max Height Appears Disappears Share Event
Mon Nov 29, 5:58 PM 4 min 76° 10° above W 53° above ENE  
Mon Nov 29, 7:36 PM < 1 min 13° 10° above WNW 13° above W  
Tue Nov 30, 5:24 PM 6 min 76° 10° above W 22° above E  
Tue Nov 30, 7:02 PM 2 min 30° 10° above WNW 30° above W  
Wed Dec 1, 4:50 PM 7 min 76° 10° above W 9° above E  
Wed Dec 1, 6:27 PM 4 min 72° 10° above WNW 72° above SW  
Thu Dec 2, 5:53 PM 5 min 81° 10° above WNW 39° above ESE  
Thu Dec 2, 7:31 PM 1 min 14° 10° above W 14° above W  
Fri Dec 3, 5:19 PM 7 min 87° 10° above WNW 15° above ESE  
Fri Dec 3, 6:56 PM 3 min 28° 10° above W 28° above WSW  
Sat Dec 4, 4:44 PM 7 min 87° 10° above W 10° above E  
Sat Dec 4, 6:22 PM 4 min 35° 10° above W 29° above S  
Sun Dec 5, 5:48 PM 6 min 41° 10° above W 14° above SE  
Mon Dec 6, 5:13 PM 7 min 47° 10° above W 10° above SE  
Mon Dec 6, 6:52 PM 3 min 12° 10° above WSW 10° above SSW  
Tue Dec 7, 4:39 PM 7 min 54° 10° above WNW 10° above SE  
Tue Dec 7, 6:17 PM 4 min 15° 10° above WSW 10° above S  
Wed Dec 8, 5:43 PM 5 min 17° 10° above W 10° above S  
Thu Dec 9, 5:08 PM 5 min 20° 10° above W 10° above SSE  
2021-12-01 17:42:00.0,Wed Dec 1, 5:42 PM,5 min,84°,10° above W,36° above E|2021-12-01 19:19:00.0,Wed Dec 1, 7:19 PM,1 min,15°,10° above W,15° above W|2021-12-02 16:55:00.0,Thu Dec 2, 4:55 PM,7 min,77°,10° above W,9° above E|2021-12-02 18:32:00.0,Thu Dec 2, 6:32 PM,3 min,48°,10° above W,48° above SW|2021-12-03 17:45:00.0,Fri Dec 3, 5:45 PM,5 min,66°,10° above WNW,26° above ESE|2021-12-03 19:22:00.0,Fri Dec 3, 7:22 PM,1 min,13°,10° above W,13° above WSW|2021-12-04 16:58:00.0,Sat Dec 4, 4:58 PM,7 min,83°,10° above WNW,10° above ESE|2021-12-04 18:35:00.0,Sat Dec 4, 6:35 PM,3 min,26°,10° above W,26° above SSW|2021-12-05 17:47:00.0,Sun Dec 5, 5:47 PM,6 min,36°,10° above W,13° above SE|2021-12-06 17:00:00.0,Mon Dec 6, 5:00 PM,7 min,49°,10° above W,10° above SE|2021-12-06 18:38:00.0,Mon Dec 6, 6:38 PM,3 min,12°,10° above WSW,10° above SSW|2021-12-07 17:50:00.0,Tue Dec 7, 5:50 PM,5 min,18°,10° above W,10° above S|2021-12-08 17:03:00.0,Wed Dec 8, 5:03 PM,6 min,25°,10° above W,10° above SSE|2021-12-10 17:06:00.0,Fri Dec 10, 5:06 PM,3 min,12°,10° above WSW,10° above SSW|

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.