One of SpaceX's broadband-beaming Starlink satellites has been captured overflying a top-secret airbase in China that was photographed by a private American Earth-observation satellite.
The visible-light photo, taken by one of Maxar Technologies' WorldView Legion satellites orbiting at an altitude of 312 miles (518 kilometers), shows what appears to be a fleet of fighter jets resting on the ramp adjacent to the runway surrounded by brown, arid soil. In the upper-left corner of the image, a ghostly oblong shadow appears in the picture with a silver-colored middle section and two darker-colored arms stretching to the sides.
The photobomber is a satellite — specifically, one of SpaceX's Starlink internet satellites, which Maxar identified as spacecraft number 33828. The mirror effect comes from a trio of rainbow-colored reflections of the satellite, which enliven the drab desert surface below.
Susanne Hake, Maxar's general manager for U.S. government, who posted the image on LinkedIn, described the colorful reflections as a "pan-sharpening spectral artifact," caused by the extremely high speeds — around 5 miles (8 kilometers) per second — at which the two satellites passed each other.
"Essentially, our imaging system was merging high-resolution black & white data with color data while the Starlink zipped past at orbital velocity," Hake wrote in the post. "Physics turned a technical imaging challenge into accidental art."
Hake added that, although the orbital encounter underscores how crowded near-Earth space has become, the incident was more of a spectacular rarity than a concern for safety or image quality.
Source: www.space.com
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