The letters represent compass directions - N is north, WNW is west by northwest, and so on.ĭisappears represents where in the night sky the International Space Station will leave your field of view. This value, like maximum height, also is measured in degrees from the horizon. If you hold your fist at arm's length and place your fist resting on the horizon, the top will be about 10 degrees.Īppears is the location in the sky where the station will be visible first. 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). The horizon is at zero degrees, and directly overhead is ninety degrees. 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 represents the height of the space station from the horizon in the night sky. Max Height is measured in degrees (also known as elevation). See the International Space Station As the third brightest object in the sky the space station is easy to see if you know when to look up. 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. All sightings will occur within a few hours before or after sunrise or sunset. All sightings will occur within a few hours before or after sunrise or sunset. Time is when the sighting opportunity will begin in your local time zone. What does all this sighting information mean?
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