メニュ−ページに戻ります。◎NEOの大きさ別，年代発見数
次の表は，軌道が計算できている，2000年までに発見されたメイン ベルト小惑星（一部，特異小惑星を含む）とNEO（q<1.15AU）の大きさ 別発見数を年代順に表したものです． Diameter > 1.0 Km Year Usual NEO Amateur ----------------------------------------- Before 1989 16,123 65 0 1990 Jan.-June 234 3 0 July-Dec. 1,109 7 0 1991 Jan.-June 450 8 0 July-Dec. 1,043 8 0 1992 Jan.-June 844 4 0 July-Dec. 713 5 0 1993 Jan.-June 1,476 5 0 July-Dec. 1,366 7 0 1994 Jan.-June 688 7 0 July-Dec. 1,334 5 0 1995 Jan.-June 710 3 1 July-Dec. 1,476 4 1 1996 Jan.-June 1,053 4 0 July-Dec. 1,776 2 0 1997 Jan.-June 1,994 4 0 July-Dec. 2,127 6 0 1998 Jan.-June 4,532 12 1 July-Dec. 6,550 22 1 1999 Jan.-June 5,599 17 0 July-Dec. 9,297 19 0 2000 Jan.-June 3,106 6 0 July-Dec. 0 0 0 ----------------------------------------- Total 63,600 223 4 0.1 Km < Diameter < 1.0 Km Year Usual NEO Amateur ----------------------------------------- Before 1989 205 43 1 1990 Jan.-June 3 1 0 July-Dec. 8 6 0 1991 Jan.-June 5 10 1 July-Dec. 11 4 0 1992 Jan.-June 8 5 0 July-Dec. 7 3 0 1993 Jan.-June 7 5 0 July-Dec. 13 6 0 1994 Jan.-June 6 4 0 July-Dec. 39 10 0 1995 Jan.-June 21 9 1 July-Dec. 92 3 0 1996 Jan.-June 32 15 0 July-Dec. 69 9 0 1997 Jan.-June 58 10 1 July-Dec. 72 13 0 1998 Jan.-June 55 43 2 July-Dec. 136 70 1 1999 Jan.-June 68 59 0 July-Dec. 247 59 0 2000 Jan.-June 35 25 0 July-Dec. 0 0 0 ----------------------------------------- Total 1,197 412 7 Diameter < 0.1 Km Year Usual NEO Amateur ----------------------------------------- Before 1989 0 0 0 1990 Jan.-June 0 0 0 July-Dec. 0 1 0 1991 Jan.-June 0 1 0 July-Dec. 0 5 0 1992 Jan.-June 0 2 0 July-Dec. 0 1 0 1993 Jan.-June 0 7 0 July-Dec. 0 2 0 1994 Jan.-June 1 6 0 July-Dec. 0 3 0 1995 Jan.-June 1 5 0 July-Dec. 0 2 0 1996 Jan.-June 0 6 0 July-Dec. 0 4 0 1997 Jan.-June 1 2 0 July-Dec. 0 8 0 1998 Jan.-June 0 9 0 July-Dec. 1 6 0 1999 Jan.-June 0 6 0 July-Dec. 0 14 0 2000 Jan.-June 0 4 0 July-Dec. 0 0 0 ----------------------------------------- Total 4 94 0 NAKANO **** Don't distribute anyone except personal use only **** (C) Copyright 2000 OAA/ComputingSection write mail from CFAD0::NAKANO on 2000-03-19 23:09:59(JST).