On the Astroviewer platform, what color coding indicates the path segment where Tiangong is sunlit and therefore visible to an observer?
Answer
Red
Astroviewer utilizes a color-coding system overlaid on the predicted ground track to help visual spotters determine visibility. The path segment colored red specifically denotes where the space station is actively being illuminated by the sun. Conversely, segments colored blue represent the section where Tiangong is passing through the Earth’s shadow and is therefore too dim to be tracked visually. This red line serves as the essential sighting map for planning observations.
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