Nakano Note (Nakano wa Kangaeru noda) NK 2889

Return Missing Comets in 2018

The following missing comets will return in 2018. But the predictions are VERY uncertainty. D/1894 F1 (Denning) T = 2018 Feb. 3.95307 TT Epoch = 2018 Feb. 11.0 TT Peri. = 105.78650 e = 0.6385727 Node = 21.99157 (2000.0) a = 4.5823480 AU Inc. = 2.99898 n'= 0.10047823 q = 1.6561858 AU P = 9.809 years From Belyaev orbit (NK 1211) using 103 observations 1894 Mar. 27-June 5. 3D/Biela T = 2018 Feb. 23.27237 TT Epoch = 2018 Feb. 11.0 TT Peri. = 264.67486 e = 0.7728180 Node = 203.41923 (2000.0) a = 3.5081778 AU Inc. = 7.64010 n'= 0.14999669 q = 0.7969949 AU P = 6.571 years From Marsden orbit (AJ 76) using 26 observations 1826-1852, mean residual 1".70. D/1895 Q1 (Swift) T = 2018 June 27.96791 TT Epoch = 2018 June 11.0 TT Peri. = 199.14703 e = 0.6266629 Node = 135.84101 (2000.0) a = 3.7208148 AU Inc. = 13.52976 n'= 0.13732417 q = 1.3891183 AU P = 7.177 years From Belyaev orbit (NK 717) using 182 observations 1895 Aug. 24-1896 Feb. 6. 3D/Biela - A T = 2018 Oct. 3.60858 TT Epoch = 2018 Oct. 9.0 TT Peri. = 274.44570 e = 0.7704766 Node = 193.78833 (2000.0) a = 3.5196345 AU Inc. = 7.93407 n'= 0.14926491 q = 0.8078384 AU P = 6.603 years From an orbit in NK 851A using 19 observations 1846-1852, mean residual 3".41. D/1886 K1 (Brooks 1) T = 2018 Oct. 11.81587 TT Epoch = 2018 Oct. 9.0 TT Peri. = 208.46033 e = 0.4700414 Node = 39.20352 (2000.0) a = 3.5486978 AU Inc. = 10.93845 n'= 0.14743498 q = 1.8806631 AU P = 6.685 years From Buckley orbit using 39 observations 1886 May 25-July 3.

Associate of the CBAT Syuichi Nakano 2015 May 8

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