Nakano Note (Nakano wa Kangaeru noda) NK 4736 227P/Catalina-LINEAR

The following improved orbital elements, by S. Nakano, are from 163 observations 1997 to 2018. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.57 arc second. The comet has passed 0.55 AU from Jupiter on 2022 Mar. 24 and will pass 0.67 AU from Jupiter on 2032 Oct. 22 UT. See the previous orbits in NK 1226 (= YC 2425), NK 1852 and NK 2720. Epoch = 2017 June 16.0 TT T = 2017 June 22.17193 +/- 0.00025 (m.e.) TT Peri. = 90.26005 +/- 0.00011 Node = 49.80040 +/- 0.00009 (2000.0) Inc. = 6.52708 +/- 0.00003 q = 1.7879238 +/- 0.0000003 AU e = 0.5011274 +/- 0.0000001 a = 3.5839285 +/- 0.0000010 AU n' = 0.14526637 +/- 0.00000006 P = 6.785 +/- 0.0000027 years T = 1997 Jan. 30.74334 TT Epoch = 1997 Feb. 1.0 TT Peri. = 90.27498 e = 0.4987328 Node = 49.93393 (2000.0) a = 3.5963010 AU Inc. = 6.51969 n'= 0.14451736 q = 1.8027075 AU P = 6.820 years T = 2003 Nov. 19.89380 TT Epoch = 2003 Nov. 17.0 TT Peri. = 90.23294 e = 0.5002802 Node = 49.90248 (2000.0) a = 3.5887009 AU Inc. = 6.52312 n'= 0.14497669 q = 1.7933448 AU P = 6.798 years T = 2010 Sept. 3.69464 TT Epoch = 2010 Sept. 1.0 TT Peri. = 90.13336 e = 0.5000165 Node = 49.88432 (2000.0) a = 3.5897300 AU Inc. = 6.52469 n'= 0.14491435 q = 1.7948057 AU P = 6.801 years The predicted orbit for the 2024 return is as follows: T = 2024 Mar. 8.24735 TT Epoch = 2024 Feb. 20.0 TT Peri. = 105.56694 e = 0.5274400 Node = 36.80962 (2000.0) a = 3.4358171 AU Inc. = 7.50875 n'= 0.15476010 q = 1.6236296 AU P = 6.369 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1997/ 040420 360 0.0 0.3- 110524 G96 0.1+ 0.7+ 970115 566 (2.7- 0.5+) 040420 360 0.2+ 0.5- 110524 G96 0.5- 0.3+ 970115 566 1.2- 1.3- 040420 360 0.4+ 0.3- 110525 G96 0.4- 0.3+ 970115 566 0.1- 0.3+ 040420 204 0.1+ 0.3- 110525 G96 0.0 0.5+ 970115 566 0.2- 0.9- 040420 204 0.2- 0.0 110525 G96 0.6- 0.3+ 970115 566 1.1+ 0.6+ 040422 704 0.4+ 0.0 110525 G96 0.7- 0.4+ 970115 566 0.1- 0.2- 040422 704 1.6+ 0.9+ 110531 H06 1.0+ 0.2- 2003/ 040422 704 0.1- 0.3+ 110531 H06 0.6+ 0.2- 031228 704 (0.1- 2.1+) 040422 704 1.0+ 0.9- 110531 H06 0.6+ 0.6- 031228 704 0.4- 1.6+ 040423 213 0.8+ 0.4+ 2016/ 031228 704 0.7- 0.9+ 040424 170 0.5- 0.6- 161023 G96 0.1- 0.2+ 031228 704 0.1- 1.2+ 040424 170 0.1+ 1.1- 161023 G96 0.2- 0.5+ 2004/ 040424 170 0.1- 1.0- 161023 G96 0.5+ 0.2+ 040123 704 0.9+ 0.1+ 040425 372 0.1+ 0.6- 161023 G96 0.6- 0.7+ 040123 704 0.8- 0.7+ 040512 699 (0.7- 2.1+) 161025 F51 0.3+ 0.1+ 040123 704 0.3- 1.4+ 040512 699 1.1- 1.0- 161025 F51 0.0 0.0 040123 704 0.6+ 0.2- 040512 699 1.7- 0.5+ 161025 F51 0.0 0.2+ 040123 699 1.2- 0.7+ 040512 699 0.0 0.7- 161025 F51 0.4+ 0.3- 040123 699 1.5- 0.4+ 040514 360 0.5+ 0.1- 161026 691 0.4+ 0.7+ 040123 699 0.4- 0.6+ 040514 360 1.2+ 0.5- 161026 691 0.5- 0.2- 040123 699 (2.0- 0.7+) 040514 360 0.2- 0.0 161026 691 0.1- 0.0 040314 703 0.1- 0.1- 040519 691 0.2+ 0.0 161026 I52 0.1- 0.0 040314 703 0.6- 1.8- 040519 691 0.3+ 0.1- 161026 I52 0.2- 0.1+ 040314 703 0.1+ 0.2+ 040519 691 0.3+ 0.0 161026 I52 0.1+ 0.4- 040314 703 0.4- 0.3+ 2009/ 161026 I52 0.1+ 0.4- 040316 704 0.8+ 0.9- 090921 291 0.7- 0.4+ 161118 G96 0.1+ 0.4+ 040316 704 0.1- 0.4+ 090921 291 0.5- 0.2+ 161118 G96 0.1- 0.0 040316 704 0.2+ 0.6+ 090921 291 0.2- 0.2+ 161118 G96 0.2+ 0.0 040322 704 0.6+ 0.5- 090923 291 0.6- 0.3+ 161118 G96 0.3+ 0.0 040322 704 0.3+ 0.0 090923 291 1.0- 1.2+ 161120 215 0.2+ 0.3+ 040322 704 0.7+ 0.9- 090923 291 0.1- 1.2+ 161120 215 0.1- 0.0 040322 704 0.4+ 0.0 090928 291 0.6- 0.1- 161120 215 0.6- 0.3+ 040325 699 0.7- 0.3- 090928 291 0.4- 0.0 161126 F51 0.0 0.1- 040325 699 (2.5- 0.5+) 090928 291 0.4- 0.2- 161126 F51 0.1- 0.1- 040325 699 0.3+ 0.7+ 091018 204 0.5- 0.3- 161126 F51 0.0 0.1+ 040325 699 0.5- 0.9- 091021 215 1.6+ 0.8+ 161204 G45 0.2- 0.1- 040409 E12 0.1+ 1.3+ 091023 A13 0.2+ 0.8+ 161204 G45 0.2+ 0.3+ 040409 E12 0.4+ 1.1+ 091023 A13 0.4+ 0.6+ 161204 G45 0.0 0.1- 040409 E12 0.1- 0.4+ 091119 G96 0.4- 0.2+ 161204 G45 0.1+ 0.3- 040409 E12 0.6+ 1.0+ 091119 G96 0.1- 0.3+ 161204 G45 0.4+ 0.1+ 040414 691 0.1- 0.2- 091119 G96 0.0 0.2+ 161204 G45 0.0 0.3- 040414 691 0.1- 0.1- 2010/ 161206 G96 0.2- 0.0 040414 696 0.3+ 0.3- 100116 C51 0.1- 0.1+ 161206 G96 0.3+ 0.1+ 040414 696 0.1+ 0.4- 100117 C51 0.0 1.2+ 161206 G96 0.0 0.0 040414 691 0.1+ 0.1- 100117 C51 0.4- 0.2+ 161206 G96 0.2+ 0.1- 040416 785 (2.0+ 0.1-) 100117 C51 0.6- 0.2+ 161218 G96 0.5- 0.3+ 040416 704 0.5+ 0.5+ 100117 C51 0.0 0.0 161218 G96 0.3- 0.2+ 040416 704 0.9+ 0.5+ 100117 C51 1.1+ 0.2- 161218 G96 0.6- 0.1+ 040416 785 1.7- 1.5+ 100117 C51 (0.3- 2.2+) 161218 G96 0.1- 0.1+ 040416 704 0.4+ 0.4- 100117 C51 0.3- 0.6- 2017/ 040416 704 1.0+ 0.3+ 2011/ 170122 130 0.7- 0.2- 040416 704 0.2+ 0.5+ 110310 G96 0.0 0.1- 170122 130 1.0+ 0.2+ 040417 699 0.2+ 1.1- 110310 G96 0.1- 0.2- 170310 G96 0.7- 0.1+ 040417 699 1.6- 0.6- 110310 G96 0.2- 0.2- 170310 G96 0.2- 0.6- 040417 699 0.4- 1.9+ 110509 G96 0.3- 0.1+ 170310 G96 0.5- 0.4- 040417 699 0.2+ 0.3+ 110509 G96 0.0 0.1+ 170310 G96 0.6- 0.0 040420 703 1.5+ 0.9- 110509 G96 0.2- 0.2- 2018/ 040420 703 0.2- 0.9+ 110509 G96 0.3- 0.0 180518 Q62 0.4- 0.6+ 040420 703 0.3- 0.2+ 110524 G96 0.0 0.0 180518 Q62 0.4- 0.9+ 040420 703 0.4- 1.5+ 110524 G96 0.0 0.4+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2022 June 11

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