Nakano Note (Nakano wa Kangaeru noda) NK 5419 3I/2025 N1 (ATLAS)
The following improved orbital elements, by S. Nakano, are from 122 observations 2025 June 5 to July 2. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.43 arc second. Original 1/a converges within 0.0000001 around 1933 and 2121. Comet has passed the point of 1000 AU from Sun around 1944 and will pass 1000 AU from Sun aroud 2105. It's very quiker. Comet will pass 0.20 AU from Mars on 2025 Oct. 3 and 0.34 AU from Jupiter on 2026 Mar. 16 UT. See an orbit in CBET 5578 (same orbit). Epoch = 2025 Oct. 12.0 TT T = 2025 Oct. 29.41062 +/- 0.01470 (m.e.) TT Peri. = 127.93850 +/- 0.01025 Node = 322.18759 +/- 0.00836 (2000.0) Inc. = 175.11382 +/- 0.00055 q = 1.3620397 +/- 0.0006497 AU e = 6.1801697 +/- 0.0048918 1/a = -3.8032444 +/- 0.0040237 1/AU origin = -3.802066 (Q= 4) future = -3.803953 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2025/ 250701 L01 0.5- 0.3+ 250702 G40 0.3- 0.3+ 250605 M22 0.6- 0.7- 250701 L01 0.6- 0.5+ 250702 V11 0.1+ 0.0 250605 M22 0.6+ 0.3- 250701 G02 0.1+ 1.2+ 250702 X07 0.0 0.0 250607 W68 0.4- 0.2+ 250701 G02 0.2+ 1.1+ 250702 X07 0.1- 0.1+ 250608 W68 0.3+ 0.5+ 250701 G02 0.2+ 1.7+ 250702 X07 0.2- 0.1+ 250614 I41 0.3- 0.6+ 250701 G00 0.3+ 0.6+ 250702 X07 0.1- 0.0 250617 W68 0.3- 0.1- 250701 L65 1.5+ 1.0+ 250702 H21 0.6+ 0.1+ 250617 W68 1.2+ 0.7+ 250701 G00 0.2+ 0.2+ 250702 H21 0.8+ 0.0 250618 I41 0.5+ 0.0 250701 G00 0.6+ 1.7+ 250702 I47 0.0 0.5- 250618 I41 0.3+ 0.5- 250701 G00 0.1- 0.4+ 250702 H21 0.8+ 0.1+ 250621 I41 0.3- 0.7- 250701 G00 0.0 0.4+ 250702 807 0.3+ 0.0 250624 W68 0.3- 0.9+ 250701 L65 0.0 0.4+ 250702 807 0.4+ 0.2- 250624 W68 0.7+ 0.9+ 250701 Z21 0.2- 0.1+ 250702 807 0.3+ 0.2- 250624 W68 0.3- 1.0+ 250701 G00 0.1+ 0.8+ 250702 X07 0.3+ 0.1- 250625 M22 0.1+ 1.2+ 250701 Z21 0.3- 0.2+ 250702 X07 0.3+ 0.0 250625 M22 0.3+ 0.6+ 250701 Z21 0.1- 0.3+ 250702 I47 0.0 0.4- 250625 M22 0.3+ 0.4+ 250701 K62 0.4+ 0.6+ 250702 W57 0.2- 0.1- 250625 M22 0.4- 0.2- 250701 K62 0.4+ 0.4+ 250702 X07 0.3+ 0.1+ 250625 M22 0.6- 1.2+ 250701 K62 0.1+ 0.4+ 250702 X07 0.0 0.3+ 250627 W68 0.1- 0.2- 250701 K62 0.3- 0.5+ 250702 T03 0.3- 0.0 250627 W68 0.5- 0.6+ 250701 Y05 0.5- 0.4- 250702 T03 0.2- 0.2+ 250627 I41 0.1- 0.0 250701 Y05 0.1- 0.4- 250702 T03 0.2- 0.2+ 250628 I41 0.1- 0.3+ 250701 G33 0.0 0.4- 250702 T03 0.0 0.2+ 250628 I41 0.0 0.2- 250701 G33 0.4- 0.8+ 250702 W57 0.2+ 0.2+ 250628 T05 0.4+ 0.4- 250702 G33 0.5- 0.7+ 250702 W85 0.1+ 0.2- 250628 T05 0.9- 0.4+ 250702 Y05 0.0 0.4- 250702 W85 0.3+ 0.0 250628 T05 0.2+ 0.2+ 250702 R17 0.2+ 0.1- 250702 W85 0.2+ 0.1- 250629 I41 0.1- 0.0 250702 X09 0.4+ 0.7- 250702 X07 0.2+ 0.4- 250629 I41 0.2+ 0.3- 250702 R17 0.2+ 0.1- 250702 X07 0.0 0.1+ 250701 W68 0.0 0.1- 250702 X09 0.3+ 0.0 250702 I47 0.2+ 0.3- 250701 W68 0.2+ 0.2- 250702 R17 0.2+ 0.1- 250702 Q22 0.0 0.1- 250701 W68 0.0 0.1- 250702 R17 0.3+ 0.2+ 250702 Q22 0.1- 0.1- 250701 W68 0.0 0.3+ 250702 Y64 0.1+ 0.1+ 250702 Q22 0.2- 0.3- 250701 474 0.0 0.3- 250702 Y64 0.3+ 0.1+ 250702 F65 0.2+ 0.1- 250701 474 0.4- 0.3- 250702 Y64 0.3+ 0.0 250702 F65 0.1+ 0.0 250701 474 0.1+ 0.1- 250702 Y64 0.3+ 0.2+ 250702 F65 0.2+ 0.1- 250701 M45 0.4- 0.1+ 250702 Y64 0.2+ 0.1+ 250702 F65 0.2+ 0.1- 250701 M45 0.8- 0.1- 250702 G40 0.3- 0.4- 250702 F65 0.2+ 0.1- 250701 M45 1.1- 0.4- 250702 G40 0.2- 0.2+ 250702 N42 0.2- 0.4+ 250701 L01 0.7- 0.5+ 250702 G40 0.2- 0.1- 250702 N42 0.2- 0.2+ 250701 L01 0.8- 0.5+ 250702 V11 0.3- 0.5- 250702 N42 0.1- 0.3+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2025 July 2