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Sighting Location

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Location: Acton, Massachusetts, United States

The following ISS sightings are possible from Wednesday Apr 24, 2019 through Friday May 10, 2019

Date Visible Max Height Appears Disappears Share Event
Sat Apr 27, 4:53 AM 3 min 13° 10° above SSE 10° above ESE  
Mon Apr 29, 4:46 AM 4 min 31° 10° above SSW 24° above E  
Tue Apr 30, 3:57 AM 3 min 17° 16° above SSE 10° above E  
Wed May 1, 4:42 AM 3 min 80° 19° above SW 38° above ENE  
Thu May 2, 3:53 AM 2 min 43° 41° above SSE 19° above ENE  
Fri May 3, 3:04 AM 1 min 18° 18° above E 10° above E  
Fri May 3, 4:36 AM 4 min 45° 14° above W 30° above NNE  
Sat May 4, 3:47 AM 2 min 75° 56° above W 30° above NE  
Sun May 5, 2:58 AM 1 min 34° 34° above ENE 15° above ENE  
Sun May 5, 4:31 AM 4 min 26° 11° above WNW 19° above NNE  
Mon May 6, 3:42 AM 2 min 36° 31° above WNW 26° above NNE  
Tue May 7, 2:53 AM 1 min 42° 42° above NNE 23° above NE  
Tue May 7, 4:27 AM 3 min 19° 10° above WNW 17° above NNE  
Wed May 8, 2:04 AM < 1 min 13° 13° above ENE 11° above ENE  
Wed May 8, 3:36 AM 3 min 22° 16° above NW 19° above NNE  
Thu May 9, 2:47 AM 1 min 29° 29° above N 22° above NNE  
Thu May 9, 4:22 AM 3 min 16° 11° above NW 15° above NNE  
2019-04-27 08:53:00.0,Sat Apr 27, 4:53 AM,3 min,13°,10° above SSE,10° above ESE|2019-04-29 08:46:00.0,Mon Apr 29, 4:46 AM,4 min,31°,10° above SSW,24° above E|2019-04-30 07:57:00.0,Tue Apr 30, 3:57 AM,3 min,17°,16° above SSE,10° above E|2019-05-01 08:42:00.0,Wed May 1, 4:42 AM,3 min,80°,19° above SW,38° above ENE|2019-05-02 07:53:00.0,Thu May 2, 3:53 AM,2 min,43°,41° above SSE,19° above ENE|2019-05-03 07:04:00.0,Fri May 3, 3:04 AM,1 min,18°,18° above E,10° above E|2019-05-03 08:36:00.0,Fri May 3, 4:36 AM,4 min,45°,14° above W,30° above NNE|2019-05-04 07:47:00.0,Sat May 4, 3:47 AM,2 min,75°,56° above W,30° above NE|2019-05-05 06:58:00.0,Sun May 5, 2:58 AM,1 min,34°,34° above ENE,15° above ENE|2019-05-05 08:31:00.0,Sun May 5, 4:31 AM,4 min,26°,11° above WNW,19° above NNE|2019-05-06 07:42:00.0,Mon May 6, 3:42 AM,2 min,36°,31° above WNW,26° above NNE|2019-05-07 06:53:00.0,Tue May 7, 2:53 AM,1 min,42°,42° above NNE,23° above NE|2019-05-07 08:27:00.0,Tue May 7, 4:27 AM,3 min,19°,10° above WNW,17° above NNE|2019-05-08 06:04:00.0,Wed May 8, 2:04 AM,< 1 min,13°,13° above ENE,11° above ENE|2019-05-08 07:36:00.0,Wed May 8, 3:36 AM,3 min,22°,16° above NW,19° above NNE|2019-05-09 06:47:00.0,Thu May 9, 2:47 AM,1 min,29°,29° above N,22° above NNE|2019-05-09 08:22:00.0,Thu May 9, 4:22 AM,3 min,16°,11° above NW,15° above NNE|

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

National Aeronautics and Space Administration Page Editor: Bill Keeter NASA Official: Jacob Keaton