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 Saturday 20th February 2021

The following ISS sightings are possible from Saturday 20th February 2021 through to Thursday 4th March 2021

DATE VISIBLE MAX HEIGHT* APPEARS DISAPPEARS
Saturday Feb 20, 2021 6:05 AM 5 min 19° 10° above S 10° above E
Sunday Feb 21, 2021 5:19 AM 3 min 13° 10° above SSE 10° above ESE
Monday Feb 22, 2021 6:06 AM 6 min 39° 10° above SW 10° above E
Monday Feb 22, 2021 6:06 AM 6 min 39° 10° above SW 10° above E
Tuesday Feb 23, 2021 5:21 AM 5 min 27° 18° above S 10° above E
Wednesday Feb 24, 2021 4:35 AM 2 min 19° 19° above SE 10° above E
Wednesday Feb 24, 2021 6:08 AM 6 min 78° 12° above WSW 10° above ENE
Thursday Feb 25, 2021 5:23 AM 4 min 57° 37° above SSW 10° above ENE
Friday Feb 26, 2021 4:37 AM 2 min 34° 34° above ESE 10° above ENE
Friday Feb 26, 2021 6:10 AM 6 min 68° 14° above W 10° above ENE
Saturday Feb 27, 2021 3:52 AM < 1 min 13° 13° above E 10° above E
Saturday Feb 27, 2021 5:25 AM 4 min 82° 39° above W 10° above ENE
Sunday Feb 28, 2021 4:39 AM 3 min 50° 50° above E 10° above ENE
Sunday Feb 28, 2021 6:12 AM 6 min 57° 12° above W 10° above ENE
Monday Mar 1, 2021 3:53 AM 1 min 16° 16° above ENE 10° above ENE
Monday Mar 1, 2021 5:26 AM 5 min 60° 32° above WNW 10° above ENE
Tuesday Mar 2, 2021 4:41 AM 3 min 56° 56° above NE 10° above ENE
Wednesday Mar 3, 2021 3:55 AM 1 min 20° 20° above ENE 10° above ENE
Wednesday Mar 3, 2021 5:28 AM 5 min 58° 27° above WNW 10° above E
Thursday Mar 4, 2021 4:43 AM 3 min 55° 55° above NNE 10° above E
* 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.