Rosetta images reveal comet 67P/C-G had a tiny, temporary moon

According to ESA, the mini-moon, unofficially named “Churymoon” by researcher Julia Marín-Yaseli de la Parra, is now being studied in more detail. Computer models suggest that the object was ejected from 67P/C-G and spent its first 12 hours of independence orbiting at a distance of between 2.4 and 3.9 km (1.5 and 2.4 mi) from the comet’s center. It then passed through the coma, which made it hard to see, but was later seen on the opposite side, indicating that it was, indeed, orbiting the comet until around October 23, 2015.

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