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 29th January 2023

The following ISS sightings are possible from Friday 27th January 2023 through to Saturday 4th February 2023

DATEVISIBLEMAX HEIGHT*APPEARSDISAPPEARS
Friday Jan 27, 2023 6:18 PM 5 min 58° 10° above WNW 25° above ENE
Friday Jan 27, 2023 7:55 PM 1 min 18° 10° above WNW 18° above WNW
Saturday Jan 28, 2023 7:06 PM 3 min 81° 10° above WNW 81° above W
Sunday Jan 29, 2023 6:18 PM 5 min 75° 10° above WNW 22° above E
Sunday Jan 29, 2023 7:55 PM 1 min 21° 10° above W 21° above W
Monday Jan 30, 2023 7:06 PM 4 min 48° 10° above WNW 44° above S
Tuesday Jan 31, 2023 6:17 PM 6 min 69° 10° above WNW 14° above ESE
Tuesday Jan 31, 2023 7:55 PM 1 min 15° 10° above W 15° above SW
Wednesday Feb 1, 2023 7:06 PM 5 min 24° 10° above W 16° above S
Thursday Feb 2, 2023 6:18 PM 6 min 35° 10° above W 10° above SE
Friday Feb 3, 2023 7:08 PM 2 min 11° 10° above WSW 10° above SSW
Saturday Feb 4, 2023 6:19 PM 5 min 17° 10° above W 10° 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.

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Also see: NASA ISS sighting information for Guernsey.

Iridium 95 Satellite ISS & Endeavour ISS & Endeavour ISS & ATV Space Shuttle Atlantis Space Shuttle Atlantis ISS ISS Crossing Moon ISS Crossing Moon ISS Crossing Sun