OAA computing section circular NK 1620 SOHO Comet returns in 2010 and 2011
C/1999 J6 = 2004 V9 (SOHO) T = 2010 May 1.46288 TT Epoch = 2010 May 4.0 TT Peri. = 25.01888 e = 0.9846717 Node = 78.35921 (2000.0) a = 3.1173460 AU Inc. = 23.96348 n'= 0.17907154 q = 0.0477837 AU P = 5.504 years From 88 observations in 1999 and 2004, mean residual 3".72. C/1999 U2 = 2005 E4 (SOHO) T = 2010 July 17.01516 TT Epoch = 2010 July 23.0 TT Peri. = 23.53772 e = 0.9845533 Node = 79.72478 (2000.0) a = 3.0705494 AU Inc. = 24.33675 n'= 0.18318080 q = 0.0474298 AU P = 5.381 years From 54 observations in 1999 and 2005, mean residual 15".5. C/1999 N5 = 2005 E4 (SOHO) T = 2010 Oct. 29.77430 TT Epoch = 2010 Oct. 11.0 TT Peri. = 23.88531 e = 0.9849055 Node = 79.68864 (2000.0) a = 3.1798329 AU Inc. = 24.69153 n'= 0.17381915 q = 0.0479981 AU P = 5.670 years From 36 observations in 1999 and 2005, mean residual 4".18. C/1999 N5 = 2005 G2 (SOHO) T = 2011 Jan. 6.54543 TT Epoch = 2010 Dec. 30.0 TT Peri. = 23.65923 e = 0.9851303 Node = 79.97292 (2000.0) a = 3.2139816 AU Inc. = 25.01625 n'= 0.17105627 q = 0.0477911 AU P = 5.762 years From 39 observations in 1999 and 2005, mean residual 5".76. C/2000 O3 = 2005 W4 (SOHO) T = 2011 Mar. 10.17812 TT Epoch = 2011 Mar. 20.0 TT Peri. = 56.98561 e = 0.9824907 Node = 45.08482 (2000.0) a = 3.0453823 AU Inc. = 13.06208 n'= 0.18545619 q = 0.0533226 AU P = 5.315 years From 63 observations in 2000 and 2005, mean residual 5".81. C/2000 C4 = 2005 W1 (SOHO) T = 2011 Aug. 17.70869 TT Epoch = 2011 Aug. 27.0 TT Peri. = 24.10865 e = 0.9857727 Node = 78.96525 (2000.0) a = 3.2175898 AU Inc. = 23.33403 n'= 0.17076862 q = 0.0457777 AU P = 5.772 years From 82 observations in 2000 and 2005, mean residual 4".55. C/1999 R1 = 2003 R5 = 2007 R5 (SOHO) T = 2011 Sept. 7.13148 TT Epoch = 2011 Aug. 27.0 TT Peri. = 48.53463 e = 0.9787985 Node = 0.03943 (2000.0) a = 2.5145079 AU Inc. = 12.71941 n'= 0.24718639 q = 0.0533112 AU P = 3.987 years From 81 observations 1999-2007, mean residual 7".89.
Director, Computing Section Syuichi Nakano 2008 May 8