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American angle appear Astronomical August beginning bright California called central chondrite close College comet complete components dependence determined direction discussion distance earth eclipse effect error fact fall field figures give given important increase indicated interest iron January June known latitude length less light limited magnitude March mass material maximum mean measured meeting meteor meteorite method Michigan month Moon motion moving nature night Notes object observations Observatory obtained occur orbit origin parallax path period photographic planet plates position possible present probably problem proper published recent recorded reference relation relative reports represented seen shown Society solar specimen stars surface Table taken telescope tion United University Variable visible volume