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WikiPedia: Ersa (vệ tinh) https://sites.google.com/carnegiescience.edu/shepp... https://planetarynames.wr.usgs.gov/Page/Planets https://minorplanetcenter.net/mpec/K18/K18O18.html https://www.iau.org/news/announcements/detail/ann1... https://www.iau.org/news/announcements/detail/ann1...