![]() Step 2: Plan your observation with a star chart Load the star chart Make sure the weather will be clear enough to observe, with as few clouds as possible.If the ISS doesn’t seem to be visible at a convenient or near-term time for your location, try picking another satellite from Heavens-Above’s daily list of brightest satellites.Other times it’s when the satellite passes into Earth’s shadow, where it can no longer reflect the direct shine of sunlight. Sometimes this is when the satellite drops back behind the horizon. End: The point at which the satellite is no longer visible.Given clear weather, this will usually be when the satellite is most visible, as the light passes to your eye through less of the Earth’s atmosphere Highest point: As the satellite passes by you, there will be a single point in its arc that’s highest above the horizon.For most satellites, this will be ~10° above the horizon. Start: The time, compass direction, and altitude to see the ISS when it first becomes visible.Brightness: Lower magnitudes indicates a brighter object.Scan the dates in the table to find a day and time when you’ll be available to observe. Each row in the table is an opportunity to see it. Click “update” at the bottom of the page to set your location.From here you can search for your location, or input your lat/long from Google Maps If this location doesn’t match where you’ll be observing from, click the latitude/longitude to input your location. ![]() ![]() Confirm that Heavens-Above knows your observing location (which allows it to tell you exactly when and where to look), by looking at the “location” noted in the top-right corner of the page.Planning Step 1: Determine when the ISS will be visible from your location
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