Nakano Note (Nakano wa Kangaeru noda) NK 5484 C/2025 R2 (SWAN)
The following improved orbital elements, by S. Nakano, are from 196 observations 2025 Sept. 12 to Oct. 11. The mean residual is +/- 0.51 arc second. See the previous orbits in CBET 5606 and CBET 5618. T = 2025 Sept.12.84025 +/- 0.00200 (m.e.) TT Peri. = 308.34139 +/- 0.00495 Node = 335.33621 +/- 0.00232 (2000.0) Inc. = 4.47362 +/- 0.00003 q = 0.5040745 +/- 0.0000049 AU e = 0.9938948 +/- 0.0001006 1/a = +0.0121116 +/- 0.0001996 1/AU a = 82.57 AU P = 750.2 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2025/ 250914 Y05 0.1- 0.1- 250917 X07 0.0 0.0 250911 247 (4.2+ 10.5-) 250914 X09 0.3- 0.2+ 250918 Y05 0.1+ 0.0 250911 247 (6.8+ 5.9+) 250914 X09 0.4- 0.2+ 250918 Y05 0.1- 0.1+ 250912 Q71 1.3- 1.0+ 250914 X09 0.6- 0.1+ 250918 Y05 0.0 0.0 250912 Q62 0.6- 0.3+ 250914 X09 0.4- 0.2+ 250918 W88 0.4+ 0.9+ 250912 Q62 0.2- 0.5+ 250914 X09 0.9- 0.1+ 250918 W88 0.6+ 0.6+ 250912 Q62 0.4- 0.5+ 250915 247 0.1+ 0.0 250918 W88 0.5+ 0.3+ 250912 Q62 0.4- 0.7+ 250915 247 0.2+ 0.1- 250918 W96 0.9- 0.3+ 250912 Q62 0.6- 0.7+ 250915 247 0.5- 0.2- 250918 W88 0.6+ 0.3+ 250912 Q62 0.4- 0.5+ 250915 247 0.6+ 0.1- 250918 W96 0.8- 0.2+ 250912 Q62 0.2- 0.2+ 250915 247 0.4- 0.8- 250918 W88 0.4+ 0.4+ 250912 Q71 1.0- 0.6- 250915 247 0.3- 0.4- 250918 W96 0.9- 0.2+ 250912 Q71 0.3+ 1.2- 250915 247 0.5+ 0.4- 250919 247 0.4- 0.3+ 250912 Y05 1.3- 0.6+ 250915 247 1.0- 0.3- 250919 247 0.3+ 0.1+ 250912 Y05 0.3- 0.5+ 250915 247 0.7+ 0.4- 250919 247 0.2- 0.0 250912 Y05 0.8+ 0.4- 250915 247 0.0 0.4- 250919 247 0.8+ 0.2+ 250912 X09 0.7- 0.0 250915 247 0.6+ 0.0 250919 247 0.3+ 0.0 250912 X09 0.2- 0.2- 250915 247 0.0 0.1- 250919 247 0.1- 0.1+ 250912 W96 0.3- 0.0 250915 247 0.2- 0.3+ 250919 247 0.2+ 0.0 250912 W96 0.3+ 0.2- 250915 247 0.2- 0.0 250919 247 0.4+ 0.1+ 250912 W94 0.5+ 0.7- 250915 247 0.1+ 0.5- 250919 247 0.1+ 0.2- 250912 W94 0.5+ 0.5- 250915 247 0.1- 0.4- 250919 247 0.3- 0.2- 250912 W96 1.3+ 0.9- 250915 247 1.3- 0.4- 250919 247 1.4+ 0.4+ 250912 W94 0.4+ 0.6- 250915 247 0.1- 0.3- 250919 247 1.0+ 0.2- 250912 X09 0.1- 0.3+ 250915 247 0.7+ 0.9- 250919 247 0.2+ 0.1+ 250912 X09 1.0- 0.5+ 250915 247 0.5+ 0.6- 250919 247 0.7+ 0.4- 250912 X09 0.7- 0.1+ 250915 247 1.7+ 0.4- 250919 247 0.6+ 1.3- 250912 X09 0.1+ 0.1- 250915 247 0.7+ 0.2+ 250919 247 0.5+ 0.1- 250912 X07 0.4- 0.2+ 250915 247 0.9+ 0.1- 250919 247 0.9+ 0.6+ 250912 X07 0.4+ 0.8- 250915 194 0.3- 0.0 250919 247 0.5+ 0.5- 250913 Q62 0.7- 0.5+ 250915 194 0.5+ 0.4- 250919 247 0.3+ 0.7- 250913 Q62 0.5- 0.4+ 250915 194 0.2- 0.1- 250919 247 0.4+ 0.0 250913 Q62 1.1- 0.1+ 250915 W96 0.0 0.4- 250919 247 0.0 0.1+ 250913 M58 (2.1+ 1.1+) 250915 W96 0.0 0.3- 250919 247 0.1+ 0.2- 250913 M58 0.7+ 0.4- 250915 W88 0.4+ 1.3+ 250919 247 0.5+ 0.5- 250913 194 0.2+ 0.3- 250915 W96 0.2+ 0.4- 250920 X07 0.1- 0.3+ 250913 M21 0.2- 0.7- 250915 W88 0.0 0.6+ 250920 X07 0.1- 0.3+ 250913 M58 0.9+ 0.1+ 250915 W88 0.3+ 0.1+ 250920 X07 0.3+ 0.6- 250913 194 0.4+ 0.0 250915 W88 0.0 0.1- 250923 P14 0.7+ 0.1- 250913 194 0.3+ 0.3- 250915 W88 0.8+ 0.1- 250923 P14 0.5+ 0.1- 250913 M58 0.6+ 0.3+ 250915 W88 0.6+ 0.1- 250923 Y05 0.9- 0.6+ 250913 M21 0.3+ 0.1+ 250916 194 0.4- 0.2+ 250923 Y05 1.5- 0.6+ 250913 194 0.1- 0.2+ 250916 194 0.3- 0.3+ 250923 Y05 0.8- 0.5+ 250913 194 0.7- 0.4- 250916 194 0.6+ 0.4- 250924 P14 0.7+ 0.1- 250913 M21 0.4- 0.1+ 250916 W88 0.1- 0.4+ 250924 P14 0.5+ 0.4- 250913 194 0.1+ 0.7- 250916 W88 0.3+ 0.8+ 250925 P14 0.5- 0.2+ 250913 X09 0.4- 0.1- 250916 W88 0.7+ 0.4+ 250925 P14 0.6- 0.0 250913 X07 0.2- 0.8- 250916 W88 0.3- 0.2+ 250927 349 0.5- 0.3- 250913 X09 0.9- 0.1+ 250916 W88 0.3- 0.5+ 250927 349 0.1- 0.2+ 250913 X07 0.4- 0.0 250917 E62 0.2- 0.4- 250929 P14 0.6+ 0.3- 250913 W96 0.1+ 0.1- 250917 E62 0.2+ 1.4- 250929 P14 0.4+ 0.3- 250913 X09 0.2+ 0.2- 250917 349 0.7+ 0.6- 250930 Y05 1.0- 0.7+ 250913 W96 0.5+ 0.2- 250917 349 (2.2+ 0.9+) 250930 Y05 0.6- 0.8+ 250913 W96 0.3+ 0.2+ 250917 247 0.0 0.7+ 250930 Y05 0.8- 0.7+ 250913 X09 0.2- 0.0 250917 247 0.3- 0.3+ 251001 E62 0.9- 0.0 250914 247 (4.4+ 0.4+) 250917 247 0.1- 0.5+ 251001 E62 0.6- 0.3- 250914 247 0.2+ 0.2+ 250917 247 0.2- 0.4+ 251001 E62 0.1- 0.2+ 250914 247 1.8+ 0.6- 250917 247 0.2+ 0.2+ 251001 P14 0.6+ 0.3- 250914 247 0.2- 1.2+ 250917 247 0.4- 0.0 251001 P14 0.5+ 0.3- 250914 M44 1.3- 0.3- 250917 247 0.1+ 0.2+ 251002 P14 0.3+ 0.2- 250914 M44 0.8- 0.8+ 250917 247 0.3+ 0.4+ 251002 P14 0.4+ 0.3- 250914 M44 0.0 0.6+ 250917 247 0.6+ 0.1+ 251005 367 0.0 0.2- 250914 194 1.0+ 0.3- 250917 M49 0.1- 0.3+ 251005 367 0.2- 0.1+ 250914 194 0.9- 0.3+ 250917 M49 0.0 0.1+ 251011 367 0.1+ 0.2- 250914 194 0.6+ 0.8- 250917 M49 0.1- 0.2+ 251011 367 0.3- 0.1- 250914 Y05 0.1- 0.3- 250917 X07 0.1- 0.5+ 251011 367 0.5+ 0.1- 250914 Y05 0.1- 0.0 250917 X07 0.3- 0.4+ 250914 Y05 0.1- 0.1- 250917 X07 0.9- 0.3- ( ) -------- Rejected Obs. Evening sky (Lati.= +35.5) Tail=0.20 AU 2025/ R. A. (2000) Decl. Delta r Daily motion Elong. Phase Mag. PA/Tail Astron. Twilight 0h TT h m , AU AU , m1 h A Oct. 10 16 05.83 -16 33.1 0.340 0.802 185.5/ 91 46.2 115.9 5.7 97/35.4 +11.7 59.6 11 16 18.73 -16 34.5 0.327 0.818 199.0/ 90 48.3 114.3 5.7 96/36.7 +13.5 57.9 12 16 32.57 -16 32.4 0.314 0.835 213.1/ 89 50.6 112.5 5.7 94/37.9 +15.4 56.0 13 16 47.38 -16 26.2 0.302 0.852 227.4/ 88 53.2 110.3 5.7 93/38.8 +17.5 53.9 14 17 03.16 -16 15.2 0.292 0.869 241.4/ 87 56.0 107.8 5.7 91/39.5 +19.8 51.5 15 17 19.87 -15 58.6 0.283 0.885 254.6/ 85 59.0 105.1 5.7 90/39.9 +22.2 49.0 16 17 37.43 -15 35.8 0.276 0.902 266.3/ 84 62.3 102.1 5.8 88/39.9 +24.7 46.2 17 17 55.73 -15 06.3 0.269 0.919 276.0/ 83 65.7 98.8 5.8 87/39.6 +27.4 43.2 18 18 14.60 -14 29.9 0.265 0.936 282.9/ 82 69.3 95.3 5.8 85/38.9 +30.0 39.9 19 18 33.81 -13 46.7 0.262 0.953 286.5/ 81 73.1 91.7 5.9 84/38.0 +32.7 36.3 20 18 53.15 -12 57.3 0.261 0.970 286.6/ 80 76.8 88.0 6.0 82/36.7 +35.3 32.5 21 19 12.36 -12 02.5 0.262 0.987 283.1/ 78 80.6 84.2 6.0 81/35.2 +37.9 28.5 22 19 31.20 -11 03.6 0.264 1.004 276.3/ 78 84.4 80.4 6.1 80/33.5 +40.2 24.2 23 19 49.47 -10 02.0 0.268 1.022 266.7/ 77 88.0 76.8 6.2 79/31.8 +42.4 19.8 24 20 06.99 -08 58.9 0.274 1.039 254.9/ 76 91.5 73.2 6.4 78/30.0 +44.3 15.4 25 20 23.63 -07 55.7 0.281 1.056 241.6/ 75 94.7 69.9 6.5 77/28.2 +46.0 10.9 26 20 39.33 -06 53.6 0.290 1.073 227.4/ 75 97.8 66.7 6.6 76/26.5 +47.4 6.5 27 20 54.04 -05 53.5 0.300 1.090 212.8/ 74 100.6 63.7 6.8 76/24.8 +48.6 2.3 28 21 07.76 -04 55.8 0.311 1.107 198.4/ 74 103.2 61.0 6.9 75/23.2 +49.6 358.2 29 21 20.51 -04 01.2 0.323 1.124 184.4/ 74 105.5 58.4 7.1 75/21.7 +50.3 354.3 30 21 32.33 -03 09.7 0.336 1.141 171.1/ 74 107.6 56.1 7.2 75/20.4 +51.0 350.7 31 21 43.29 -02 21.5 0.350 1.157 158.6/ 74 109.4 54.0 7.4 74/19.1 +51.4 347.4 Nov. 1 21 53.44 -01 36.6 0.365 1.174 147.0/ 73 111.1 52.0 7.5 74/17.9 +51.8 344.4 2 22 02.84 -00 54.8 0.380 1.191 136.4/ 73 112.6 50.3 7.7 74/16.8 +52.1 341.6 3 22 11.55 -00 15.9 0.396 1.208 126.6/ 73 113.9 48.7 7.8 73/15.9 +52.4 339.1 4 22 19.64 +00 20.3 0.413 1.225 117.7/ 73 115.0 47.2 8.0 73/15.0 +52.6 336.9 5 22 27.16 +00 53.8 0.430 1.242 109.6/ 73 116.0 45.9 8.1 73/14.2 +52.7 334.9 6 22 34.16 +01 25.0 0.448 1.258 102.2/ 73 116.8 44.7 8.3 73/13.4 +52.9 333.1 7 22 40.70 +01 54.0 0.466 1.275 95.5/ 74 117.5 43.6 8.4 73/12.7 +53.0 331.5 8 22 46.81 +02 21.1 0.484 1.292 89.4/ 74 118.1 42.6 8.5 73/12.1 +53.1 330.1 9 22 52.53 +02 46.4 0.503 1.308 83.9/ 74 118.6 41.6 8.7 72/11.5 +53.2 328.9 10 22 57.90 +03 10.0 0.522 1.325 78.9/ 74 119.1 40.8 8.8 72/11.0 +53.4 327.8 11 23 02.96 +03 32.1 0.541 1.341 74.3/ 74 119.4 40.0 8.9 72/10.5 +53.5 326.9 12 23 07.73 +03 52.9 0.561 1.358 70.2/ 74 119.6 39.3 9.1 72/10.0 +53.7 326.1 13 23 12.23 +04 12.5 0.581 1.374 66.4/ 74 119.8 38.7 9.2 72/9.62 +53.8 325.4 14 23 16.50 +04 31.0 0.601 1.391 63.0/ 74 119.9 38.1 9.3 72/9.24 +54.0 324.8 15 23 20.55 +04 48.4 0.622 1.407 59.9/ 74 120.0 37.5 9.5 72/8.87 +54.2 324.3 16 23 24.40 +05 05.0 0.642 1.423 57.0/ 74 120.0 37.0 9.6 71/8.54 +54.4 324.0 17 23 28.07 +05 20.7 0.663 1.440 54.4/ 74 119.9 36.5 9.7 71/8.22 +54.6 323.7 18 23 31.58 +05 35.7 0.684 1.456 52.0/ 74 119.8 36.1 9.8 71/7.93 +54.8 323.5 19 23 34.93 +05 49.9 0.706 1.472 49.8/ 74 119.7 35.7 9.9 71/7.65 +55.0 323.3 20 23 38.14 +06 03.6 0.727 1.488 47.8/ 74 119.5 35.3 10.0 71/7.39 +55.3 323.3 21 23 41.23 +06 16.7 0.749 1.504 45.9/ 74 119.3 34.9 10.1 71/7.15 +55.5 323.3 22 23 44.19 +06 29.2 0.771 1.520 44.2/ 74 119.1 34.6 10.3 71/6.92 +55.8 323.4 23 23 47.05 +06 41.3 0.793 1.536 42.7/ 74 118.8 34.3 10.4 71/6.70 +56.1 323.5 24 23 49.80 +06 52.9 0.815 1.552 41.2/ 74 118.6 34.0 10.5 70/6.50 +56.3 323.7 25 23 52.46 +07 04.2 0.838 1.568 39.9/ 74 118.2 33.7 10.6 70/6.30 +56.6 323.9 26 23 55.04 +07 15.0 0.860 1.584 38.6/ 74 117.9 33.4 10.7 70/6.12 +56.9 324.2 27 23 57.54 +07 25.6 0.883 1.600 37.4/ 74 117.5 33.2 10.8 70/5.94 +57.2 324.6 28 23 59.96 +07 35.8 0.906 1.616 36.4/ 74 117.2 32.9 10.9 70/5.78 +57.6 325.0 29 00 02.31 +07 45.7 0.929 1.631 35.4/ 74 116.8 32.7 11.0 70/5.62 +57.9 325.5 30 00 04.60 +07 55.4 0.952 1.647 34.4/ 74 116.3 32.5 11.1 70/5.47 +58.2 326.0 Dec. 1 00 06.83 +08 04.8 0.975 1.663 33.6/ 74 115.9 32.2 11.2 70/5.33 +58.5 326.6 m1 = 9.0 + 5 log + 10.0 log
Associate of the CBAT Syuichi Nakano 2025 Oct. 14