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 Seoul

You find a list of the next sighting opportunities for Seoul 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 18, 2021

Begin
06:54:01 PM KST
Dur.
4:09
-2.5 mag
Mon, Jan 18, 2021 Begin Max. End
Time (KST) 06:54:01 PM 06:57:12 PM 06:58:10 PM
Direction SSW SE E
Altitude 10° 44° 34°
Brightness -2.5 mag -2.5 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.

Tue, Jan 19, 2021

Begin
06:06:50 PM KST
Dur.
5:31
-1.6 mag
Tue, Jan 19, 2021 Begin Max. End
Time (KST) 06:06:50 PM 06:09:35 PM 06:12:21 PM
Direction S SE ENE
Altitude 10° 24° 10°
Brightness -1.6 mag -1.6 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.
Begin
07:43:16 PM KST
Dur.
2:26
-1.8 mag
Tue, Jan 19, 2021 Begin Max. End
Time (KST) 07:43:16 PM 07:45:42 PM 07:45:42 PM
Direction W NW NW
Altitude 10° 29° 29°
Brightness -1.8 mag -1.8 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.

Wed, Jan 20, 2021

Begin
06:55:14 PM KST
Dur.
4:58
-2.8 mag
Wed, Jan 20, 2021 Begin Max. End
Time (KST) 06:55:14 PM 06:58:29 PM 07:00:12 PM
Direction WSW NW NNE
Altitude 10° 53° 24°
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.

Thu, Jan 21, 2021

Begin
06:07:27 PM KST
Dur.
6:38
-3.2 mag
Thu, Jan 21, 2021 Begin Max. End
Time (KST) 06:07:27 PM 06:10:46 PM 06:14:05 PM
Direction SW SE NE
Altitude 10° 84° 10°
Brightness -3.2 mag -3.2 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
07:45:50 PM KST
Dur.
1:45
-0.9 mag
Thu, Jan 21, 2021 Begin Max. End
Time (KST) 07:45:50 PM 07:47:35 PM 07:47:35 PM
Direction WNW NNW NNW
Altitude 10° 15° 15°
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.

Fri, Jan 22, 2021

Begin
06:57:23 PM KST
Dur.
4:34
-1.4 mag
Fri, Jan 22, 2021 Begin Max. End
Time (KST) 06:57:23 PM 07:00:01 PM 07:01:57 PM
Direction W NNW NNE
Altitude 10° 22° 14°
Brightness -1.4 mag -1.4 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 23, 2021

Begin
06:09:08 PM KST
Dur.
6:03
-2.0 mag
Sat, Jan 23, 2021 Begin Max. End
Time (KST) 06:09:08 PM 06:12:09 PM 06:15:11 PM
Direction W NNW NNE
Altitude 10° 32° 10°
Brightness -2.0 mag -2.0 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 24, 2021

Begin
07:00:25 PM KST
Dur.
2:41
-0.6 mag
Sun, Jan 24, 2021 Begin Max. End
Time (KST) 07:00:25 PM 07:01:45 PM 07:03:06 PM
Direction NW NNW N
Altitude 10° 12° 10°
Brightness -0.6 mag -0.6 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.

Mon, Jan 25, 2021

Begin
06:11:41 PM KST
Dur.
4:13
-0.9 mag
Mon, Jan 25, 2021 Begin Max. End
Time (KST) 06:11:41 PM 06:13:47 PM 06:15:54 PM
Direction WNW NNW NNE
Altitude 10° 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.