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WikiPedia: 789_Lena http://articles.adsabs.harvard.edu//full/seri/RMxA... http://cfa-www.harvard.edu/iau/lists/NumberedMPs.t... http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&b... http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=789;orb=1 http://en.wikipedia.org/wiki/Meanings_of_minor_pla...