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WikiPedia: 210_Isabella ftp://ftp.lowell.edu/pub/elgb/astorb.html http://cfa-www.harvard.edu/iau/lists/NumberedMPs.h... http://spiff.rit.edu/richmond/parallax/phot/LCSUMP... http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&b... http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=210;orb=1