Nakano Note (Nakano wa Kangaeru noda) NK 5394 P/Rankin (2024 L4 = 2014 N4 = 2017 B6)
The following improved orbital elements, by S. Nakano, are from 98 observations 2004 to 2024. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.32 arc second. Residuals for previous returns were +/-0.66 deg for 2004, +/-0.28 deg for 2014 and +/-0.05 deg for 2017 observations from a recent unpublished orbit. The comet has passed 0.011 AU and 0.079 AU from Venus on 1997 July 4 and 2020 Dec. 10 UT, respectively. Epoch = 2024 Mar. 31.0 TT T = 2024 Apr. 14.29453 +/- 0.00004 (m.e.) TT Peri. = 53.71457 +/- 0.00008 Node = 139.78002 +/- 0.00008 (2000.0) Inc. = 10.04547 +/- 0.00003 q = 0.6722263 +/- 0.0000003 AU e = 0.6983898 +/- 0.0000001 a = 2.2287917 +/- 0.0000014 AU n' = 0.29621010 +/- 0.00000028 P = 3.327 +/- 0.0000031 years T = 2004 Mar. 29.50115 TT Epoch = 2004 Mar. 16.0 TT Peri. = 52.54933 e = 0.6949302 Node = 140.80218 (2000.0) a = 2.2337381 AU Inc. = 10.14371 n'= 0.29522675 q = 0.6814459 AU P = 3.338 years [ T = 2007 Aug. 1.29034 TT Epoch = 2007 Aug. 8.0 TT Peri. = 52.61855 e = 0.6946901 Node = 140.75940 (2000.0) a = 2.2336052 AU Inc. = 10.13921 n'= 0.29525309 q = 0.6819417 AU P = 3.338 years ] [ T = 2010 Dec. 1.68811 TT Epoch = 2010 Nov. 20.0 TT Peri. = 52.57681 e = 0.6950357 Node = 140.75869 (2000.0) a = 2.2331920 AU Inc. = 10.14109 n'= 0.29533503 q = 0.6810438 AU P = 3.337 years ] T = 2014 Apr. 4.02342 TT Epoch = 2014 Apr. 13.0 TT Peri. = 52.64506 e = 0.6939088 Node = 140.65818 (2000.0) a = 2.2354498 AU Inc. = 10.12753 n'= 0.29488773 q = 0.6842515 AU P = 3.342 years T = 2017 Aug. 6.88773 TT Epoch = 2017 July 26.0 TT Peri. = 52.68695 e = 0.6942423 Node = 140.63774 (2000.0) a = 2.2346955 AU Inc. = 10.12736 n'= 0.29503703 q = 0.6832753 AU P = 3.341 years [ T = 2020 Dec. 9.40592 TT Epoch = 2020 Dec. 17.0 TT Peri. = 52.72595 e = 0.6938478 Node = 140.58702 (2000.0) a = 2.2367862 AU Inc. = 10.12089 n'= 0.29462348 q = 0.6847970 AU P = 3.345 years ] The predicted orbit for the 2027 return is as follows: T = 2027 Aug. 11.86739 TT Epoch = 2027 Aug. 23.0 TT Peri. = 53.68696 e = 0.6988550 Node = 139.78533 (2000.0) a = 2.2278133 AU Inc. = 10.04802 n'= 0.29640526 q = 0.6708948 AU P = 3.325 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2004/ 240616 I52 0.3+ 0.3- 240626 Y66 0.1- 0.1- 040819 T14 0.3+ 0.2- 240616 I52 0.3+ 0.3+ 240626 Y66 0.0 0.5+ 040819 T14 0.5+ 0.1- 240616 I52 0.4+ 0.2- 240626 Y66 0.1- 0.4+ 040819 T14 0.3+ 0.0 240616 I52 0.0 0.1+ 240628 Y66 0.1- 0.2+ 2014/ 240617 I52 0.1+ 0.1+ 240628 Y66 0.2+ 0.1+ 140120 F51 0.1- 0.1- 240617 I52 0.0 0.1- 240628 Y66 0.1- 0.8+ 140120 F51 0.1- 0.0 240617 I52 0.2+ 0.2+ 240630 F51 0.1- 0.0 140131 C51 (2.3- 0.4-) 240617 I52 0.1- 0.1- 240630 F51 0.1- 0.0 140704 F51 0.1- 0.0 240617 F52 0.0 0.2+ 240630 F51 0.0 0.1+ 140704 F51 0.2- 0.1- 240617 F52 0.1+ 0.1+ 240630 F51 0.0 0.0 140704 F51 0.0 0.0 240618 L06 0.1- 0.6- 240701 F52 0.0 0.1- 140718 T14 0.1- 0.3- 240618 L06 0.2- 0.8- 240701 F52 0.0 0.1+ 2016/ 240618 Y66 0.2- 0.6+ 240702 W85 0.0 0.2- 161223 T09 0.1+ 0.3- 240618 Y66 0.6+ 0.5+ 240702 W85 0.2- 0.1- 2017/ 240618 Y66 0.1+ 0.2+ 240704 L01 0.8- 0.2- 170121 T09 0.1+ 0.1+ 240618 I52 0.2- 0.0 240704 L01 0.5+ 0.2- 170121 T09 0.2- 0.2- 240618 I52 0.2- 0.0 240705 Y66 0.1- 0.2+ 170121 T09 0.2+ 0.0 240618 I52 0.2- 0.2- 240705 Y66 0.2- 0.3+ 170123 T09 0.1- 0.0 240619 Y66 0.9- 0.5+ 240705 Y66 0.2- 0.3+ 170123 T09 0.3- 0.1+ 240619 Y66 0.6- 0.0 240705 Y66 0.1- 0.3+ 170123 T09 0.1+ 0.1+ 240619 Y66 0.4- 0.1- 240705 Y66 0.0 0.3+ 170126 T09 0.2+ 0.2- 240619 F65 0.2- 0.3- 240707 673 0.1+ 0.1+ 170126 T09 0.0 0.1+ 240619 F65 0.3- 0.5+ 240707 673 0.2+ 0.1+ 170126 T09 0.0 0.0 240619 F65 0.3+ 0.3+ 240708 W62 1.1+ 0.2+ 2024/ 240619 F65 0.2+ 0.1+ 240708 W62 0.2+ 0.2+ 240322 G96 0.2- 1.4+ 240620 Y66 0.1+ 0.2+ 240708 W62 0.3+ 0.2+ 240322 G96 0.3- 0.1+ 240620 Y66 0.0 0.1- 240727 X09 0.5- 0.4- 240322 G96 0.1- 1.1+ 240620 Y66 0.3- 0.4- 240727 X09 0.6+ 0.5- 240322 G96 0.4+ 0.1+ 240621 Y66 0.7- 0.4+ 240727 X09 0.0 0.5+ 240615 G96 0.2+ 0.2- 240621 Y66 0.3- 0.1+ 240727 X09 0.6- 0.4+ 240615 G96 0.0 0.1- 240621 Y66 0.5- 0.1+ 240727 X09 0.2+ 0.1- 240615 G96 0.8- 0.2+ 240621 Y66 0.1- 0.0 240727 X09 0.1- 0.3+ 240615 G96 0.3+ 0.1- 240625 Y66 0.3- 0.4+ 240729 X07 0.2- 0.2+ 240615 G96 0.0 0.4- 240625 Y66 0.1+ 0.4+ 240729 X07 0.3- 0.0 240615 G96 0.4+ 0.1+ 240625 Y66 0.0 0.2+ ( ) -------- Rejected Obs.
Associate of the CBAT Late edition Syuichi Nakano 2025 Feb. 28