International Space Station

ISS observation

When can I spot the Space Station?

Observing of the International Space Station

The International Space Station (ISS) can easily be spotted with the naked eye. Because of its size (110m x 100m x 30m), it reflects a large amount of sunlight.

The best time to observe the ISS is when it is nighttime at your location, and the Space Station is sunlit. Often, such a viewing situation occurs in the morning before sunrise, or in the evening after sunset.

Visible ISS passes over Montevideo

You find a list of the next sighting opportunities for Montevideo below. The green bars indicate the brightness of the ISS on its pass.

The list contains all visible passes of the ISS during the next ten days. Please click on a pass to get more details.

Past ISS passes

Mon, Jan 25, 2021

► Begin
03:49:15 AM UTC-03:00		 Dur.
2:25		 -1.5 mag
Mon, Jan 25, 2021 Begin Max. End
Time (UTC-03:00) 03:49:15 AM 03:49:15 AM 03:51:40 AM
Direction ENE ENE ESE
Altitude 24° 24° 10°
Brightness -1.5 mag -1.5 mag
The grey circle indicates the area where the Space Station is at least 10° above the horizon.
The red line shows where the ISS is sunlit and visible.
On the blue line the ISS is in the Earth's shadow and invisible or it is less than 10° above the horizon or the sky is not dark enough to see the ISS.
► Begin
05:22:38 AM UTC-03:00		 Dur.
5:56		 -1.7 mag
Mon, Jan 25, 2021 Begin Max. End
Time (UTC-03:00) 05:22:38 AM 05:25:36 AM 05:28:34 AM
Direction W SW SSE
Altitude 10° 28° 10°
Brightness -1.7 mag -1.7 mag
The grey circle indicates the area where the Space Station is at least 10° above the horizon.
The red line shows where the ISS is sunlit and visible.
On the blue line the ISS is in the Earth's shadow and invisible or it is less than 10° above the horizon or the sky is not dark enough to see the ISS.

Tue, Jan 26, 2021

► Begin
04:36:52 AM UTC-03:00		 Dur.
4:36		 -2.6 mag
Tue, Jan 26, 2021 Begin Max. End
Time (UTC-03:00) 04:36:52 AM 04:38:11 AM 04:41:28 AM
Direction W SW SE
Altitude 29° 47° 10°
Brightness -2.6 mag -2.6 mag
The grey circle indicates the area where the Space Station is at least 10° above the horizon.
The red line shows where the ISS is sunlit and visible.
On the blue line the ISS is in the Earth's shadow and invisible or it is less than 10° above the horizon or the sky is not dark enough to see the ISS.

Wed, Jan 27, 2021

► Begin
03:51:27 AM UTC-03:00		 Dur.
2:46		 -2.8 mag
Wed, Jan 27, 2021 Begin Max. End
Time (UTC-03:00) 03:51:27 AM 03:51:27 AM 03:54:13 AM
Direction SE SE SE
Altitude 57° 57° 10°
Brightness -2.8 mag -2.8 mag
The grey circle indicates the area where the Space Station is at least 10° above the horizon.
The red line shows where the ISS is sunlit and visible.
On the blue line the ISS is in the Earth's shadow and invisible or it is less than 10° above the horizon or the sky is not dark enough to see the ISS.
► Begin
05:26:28 AM UTC-03:00		 Dur.
3:14		 -0.7 mag
Wed, Jan 27, 2021 Begin Max. End
Time (UTC-03:00) 05:26:28 AM 05:28:05 AM 05:29:42 AM
Direction SW SSW S
Altitude 10° 13° 10°
Brightness -0.7 mag -0.7 mag
The grey circle indicates the area where the Space Station is at least 10° above the horizon.
The red line shows where the ISS is sunlit and visible.
On the blue line the ISS is in the Earth's shadow and invisible or it is less than 10° above the horizon or the sky is not dark enough to see the ISS.

Thu, Jan 28, 2021

► Begin
03:05:58 AM UTC-03:00		 Dur.
0:50		 -0.9 mag
Thu, Jan 28, 2021 Begin Max. End
Time (UTC-03:00) 03:05:58 AM 03:05:58 AM 03:06:48 AM
Direction ESE ESE ESE
Altitude 16° 16° 10°
Brightness -0.9 mag -0.9 mag
The grey circle indicates the area where the Space Station is at least 10° above the horizon.
The red line shows where the ISS is sunlit and visible.
On the blue line the ISS is in the Earth's shadow and invisible or it is less than 10° above the horizon or the sky is not dark enough to see the ISS.
► Begin
04:38:56 AM UTC-03:00		 Dur.
4:02		 -1.1 mag
Thu, Jan 28, 2021 Begin Max. End
Time (UTC-03:00) 04:38:56 AM 04:40:32 AM 04:42:58 AM
Direction WSW SSW SSE
Altitude 14° 18° 10°
Brightness -1.1 mag -1.1 mag
The grey circle indicates the area where the Space Station is at least 10° above the horizon.
The red line shows where the ISS is sunlit and visible.
On the blue line the ISS is in the Earth's shadow and invisible or it is less than 10° above the horizon or the sky is not dark enough to see the ISS.

Fri, Jan 29, 2021

► Begin
03:53:24 AM UTC-03:00		 Dur.
2:36		 -1.7 mag
Fri, Jan 29, 2021 Begin Max. End
Time (UTC-03:00) 03:53:24 AM 03:53:24 AM 03:56:00 AM
Direction SSW SSW SSE
Altitude 27° 27° 10°
Brightness -1.7 mag -1.7 mag
The grey circle indicates the area where the Space Station is at least 10° above the horizon.
The red line shows where the ISS is sunlit and visible.
On the blue line the ISS is in the Earth's shadow and invisible or it is less than 10° above the horizon or the sky is not dark enough to see the ISS.

Sat, Jan 30, 2021

► Begin
03:07:50 AM UTC-03:00		 Dur.
1:04		 -1.1 mag
Sat, Jan 30, 2021 Begin Max. End
Time (UTC-03:00) 03:07:50 AM 03:07:50 AM 03:08:54 AM
Direction SSE SSE SE
Altitude 18° 18° 10°
Brightness -1.1 mag -1.1 mag
The grey circle indicates the area where the Space Station is at least 10° above the horizon.
The red line shows where the ISS is sunlit and visible.
On the blue line the ISS is in the Earth's shadow and invisible or it is less than 10° above the horizon or the sky is not dark enough to see the ISS.

Sun, Jan 31, 2021

► Begin
03:55:11 AM UTC-03:00		 Dur.
1:54		 -0.7 mag
Sun, Jan 31, 2021 Begin Max. End
Time (UTC-03:00) 03:55:11 AM 03:55:30 AM 03:57:05 AM
Direction SSW SSW S
Altitude 12° 13° 10°
Brightness -0.7 mag -0.7 mag
The grey circle indicates the area where the Space Station is at least 10° above the horizon.
The red line shows where the ISS is sunlit and visible.
On the blue line the ISS is in the Earth's shadow and invisible or it is less than 10° above the horizon or the sky is not dark enough to see the ISS.

Mon, Feb 01, 2021

► Begin
03:09:33 AM UTC-03:00		 Dur.
0:49		 -0.7 mag
Mon, Feb 01, 2021 Begin Max. End
Time (UTC-03:00) 03:09:33 AM 03:09:33 AM 03:10:22 AM
Direction S S SSE
Altitude 14° 14° 10°
Brightness -0.7 mag -0.7 mag
The grey circle indicates the area where the Space Station is at least 10° above the horizon.
The red line shows where the ISS is sunlit and visible.
On the blue line the ISS is in the Earth's shadow and invisible or it is less than 10° above the horizon or the sky is not dark enough to see the ISS.