What to See & When

Here you can find information on;

  • Today's weather forecast for Guernsey
  • Monthly highlights with Sky Charts to help you visualise what celestial bodies are visible
  • Yearly information on the sun, moon, planets and meteors
  • A glossary of astronomical terms used in the various pages

Sky Charts generated by Sky Safari, Simulation Curriculum Corp.

ISS Sighting Opportunites

Below is the latest information from NASA on possible sightings along with more detailed information about seeing ISS and other satellites from Guernsey jump to section.

Retrieved from: NASA Spot the Station on Sunday 24th July 2022

The following ISS sightings are possible from Friday 22nd July 2022 through to Friday 29th July 2022

Friday Jul 22, 2022 11:06 PM 5 min 83° 10° above WNW 22° above ESE
Saturday Jul 23, 2022 12:42 AM 1 min 18° 10° above W 18° above W
Saturday Jul 23, 2022 10:17 PM 7 min 68° 10° above WNW 10° above E
Saturday Jul 23, 2022 11:54 PM 3 min 39° 10° above W 39° above SW
Sunday Jul 24, 2022 11:05 PM 5 min 57° 10° above WNW 32° above SE
Monday Jul 25, 2022 10:17 PM 6 min 79° 10° above WNW 14° above ESE
Monday Jul 25, 2022 11:54 PM 2 min 18° 10° above W 18° above WSW
Tuesday Jul 26, 2022 11:05 PM 4 min 28° 10° above W 25° above S
Wednesday Jul 27, 2022 10:17 PM 5 min 41° 10° above WNW 17° above SE
Thursday Jul 28, 2022 11:06 PM 2 min 13° 10° above WSW 13° above SSW
Friday Jul 29, 2022 10:17 PM 5 min 20° 10° above W 13° above S
* Flyovers that will reach a Max Height of at least 40°, provide the best chance for a sighting opportunity because they are visible above most landscapes and buildings.

Visible passes of the International Space Station and other satellites

The International Space Station (ISS) regularly passes through our skies. It appears like a very bright star moving from west to east, at an angular velocity similar to a plane, and taking a few minutes to cross the sky. During morning passes, especially the very early morning ones, the satellite may be in the Earth’s shadow, and therefore invisible, for the first part of a pass. Similarly, the satellite may enter the Earth’s shadow during the late evening passes, and disappear from view. Note that many other, fainter, satellites are also visible. The ISS is by far the brightest, being as large as a football pitch. The much-hyped Humanity Star satellite is likely to be extremely faint – almost never visible to the naked eye.

Heavens Above

The link, left, will take you directly to a page, configured for the latitude and longitude of St Peter Port, Guernsey, on the excellent Heavens Above web site which provides up-to-date predictions of the ISS and many other satellites.

Then click on “ISS” for Space Station predictions. The table then shows the local time, altitude (in degrees above the horizon) and compass direction to look when it first becomes visible; the time, altitude and direction when it reaches maximum altitude; and the time, altitude and direction when it disappears. In the evening the “end” time may be when it disappears into the Earth’s shadow; in the morning the “start” time may be when it emerges from the Earth’s shadow.

Of special interest are flares from the ‘Iridium’ satellites. You can get more accurate predictions for these flares by changing the location on the Heavens Above web site to your Guernsey parish, or Alderney, Sark or Herm by clicking on the map below.

/> /> /> > /> /> /> /> />/>

Also see: NASA ISS sighting information for Guernsey.