ÃÓ롦ĥ×ÂÀ±¡ÊC/2002 C1¡Ë¤Îµ°Æ»Í×ÁÇ¡ÊÄ󶡡§Â¼²¬·ò¼£»á¡Ë ---------------------------------------------------------------------- Comet C/2002 C1 ( Ikeya-Zhang ) = C/1661 C1 The following improved orbital elements by Kenji Muraoka, are from 325 observations 1661 to 2002, perturbations by 8 Plantes and Ceres were taken into account. The mean residual is +/- 1.28 arc seconds. Epoch = 2002 Mar. 27.0 TT JDT = 2452360.5 T = 2002 Mar. 18.99691 +/- 0.00074 (m.e.) TT Peri. = 34.69394 +/- 0.00292 Node = 93.33212 +/- 0.00322 (2000.0) Incl. = 28.12774 +/- 0.00062 q = 0.5071640 +/- 0.0000001 AU e = 0.9900779 +/- 0.0000000 a = 51.1148172 +/- 0.0000002 AU n¡¬= 0.00269702 +/- 0.00000000 P = 365.443 +/- 0.0000018 years T = 1661 Jan. 28.91823 TT Epoch = 1661 Feb. 2.0 TT Peri. = 35.09102 e = 0.9902791 Node = 93.36968 (2000.0) a = 52.7773334 AU Incl. = 28.07592 n¡¬= 0.002570591 q = 0.5130407 AU P = 383.417 years