18736 (1998 NU)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4911399789 ± 8.50e-09
Semi-major axis (a)2.3496959498 AU ± 1.22e-09
Inclination (i)2.80616050° ± 8.43e-07
Long. of Asc. Node (Ω)297.42195380° ± 1.66e-05
Arg. of Perihelion (ω)222.90480980° ± 1.67e-05
Mean Anomaly (M)309.18689309° ± 6.93e-07
Mean Motion (n)0.2736495723°/day ± 2.12e-10
Perihelion dist (q)1.19566633 AU ± 2.00e-08
Aphelion dist (Q)3.50372557 AU ± 2.01e-08
Orbital Period3.60178266 yr ± 2.80e-09
Physical Parameters
H (abs. magnitude)15.98
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.233″
Uncertainty0
Orbit TypeAmor
MOID0.207942 AU
Observations Used1910
Oppositions52
Arc Total1954-2026
First Observation Used1954-05-25
Last Observation Used2026-01-12
Observations (2071)
Date Type RA Dec Mag Band Observatory
2021-10-07 05:25:46 C 00 43 46.71 +09 07 36.7 V G96
2021-10-07 05:33:12 C 00 43 46.39 +09 07 34.6 V G96
2021-10-07 05:40:38 C 00 43 46.07 +09 07 32.8 V G96
2021-10-09 05:48:09 C 00 41 43.17 +08 55 03.8 V 703
2021-10-09 05:56:21 C 00 41 42.90 +08 55 02.1 V 703
2021-10-09 06:04:33 C 00 41 42.42 +08 54 59.5 V 703
2021-10-09 06:12:46 C 00 41 42.03 +08 54 57.6 V 703
2021-10-12 12:32:14 C 00 38 22.69 +08 34 16.9 V D29
2021-10-12 12:52:36 C 00 38 21.85 +08 34 10.5 V D29
2021-10-26 06:44:12 C 00 25 10.871 +07 06 31.85 U F52
2021-10-26 07:00:47 C 00 25 10.250 +07 06 27.65 U F52
2021-10-26 07:17:29 C 00 25 09.622 +07 06 23.32 U F52
2021-10-26 07:34:13 C 00 25 08.990 +07 06 19.07 U F52
2021-10-28 03:24:21 C 00 23 34.62 +06 55 09.0 V G96
2021-10-28 03:32:25 C 00 23 34.32 +06 55 07.3 V G96
2021-10-28 03:40:29 C 00 23 34.01 +06 55 05.3 V G96
2021-10-28 03:48:35 C 00 23 33.71 +06 55 03.0 V G96
2021-10-30 06:51:34 C 00 21 48.114 +06 42 22.55 U F51
2021-10-30 07:09:55 C 00 21 47.475 +06 42 18.13 U F51
2021-10-30 07:28:18 C 00 21 46.832 +06 42 13.61 U F51
2021-10-30 07:46:56 C 00 21 46.190 +06 42 09.01 U F51
2021-11-06 06:25:43 C 00 16 38.625 +06 03 36.16 U F52
2021-11-06 06:39:30 C 00 16 38.234 +06 03 33.17 U F52
2021-11-06 06:53:17 C 00 16 37.836 +06 03 30.16 U F52
2021-11-09 04:13:27 C 00 14 48.45 +05 49 01.8 V G96
2021-11-09 04:21:38 C 00 14 48.25 +05 49 00.2 V G96
2021-11-09 04:29:49 C 00 14 48.06 +05 48 58.2 V G96
2021-11-09 04:38:00 C 00 14 47.95 +05 48 56.8 V G96
2021-11-09 05:23:39 C 00 14 46.836 +05 48 48.71 U F51
2021-11-09 05:41:33 C 00 14 46.357 +05 48 44.94 U F51
2021-11-09 05:59:24 C 00 14 45.898 +05 48 41.36 U F51
2021-11-27 06:06:00 C 00 08 05.023 +04 45 24.13 U F52
2021-11-27 06:21:39 C 00 08 04.919 +04 45 22.50 U F52
2021-11-27 06:37:19 C 00 08 04.806 +04 45 21.33 U F52
2021-11-27 06:52:58 C 00 08 04.701 +04 45 19.92 U F52
2023-05-22 13:20:12 C 20 07 38.553 -21 37 32.37 X F51
2023-05-22 13:38:01 C 20 07 38.334 -21 37 32.48 X F51
2023-05-22 13:55:50 C 20 07 38.136 -21 37 32.62 X F51
2023-05-22 14:13:39 C 20 07 37.914 -21 37 32.83 X F51
2023-07-12 22:42:01 C 19 18 16.346 -22 55 38.39 V M22
2023-07-12 22:48:14 C 19 18 15.989 -22 55 38.64 V M22
2023-07-12 22:56:47 C 19 18 15.550 -22 55 38.75 V M22
2023-07-12 23:40:28 C 19 18 13.152 -22 55 42.56 V M22
2024-06-10 10:59:41 C 23 24 44.716 -01 54 19.26 V V00
2024-06-10 11:07:47 C 23 24 44.834 -01 54 18.22 V V00
2024-06-10 11:15:52 C 23 24 44.978 -01 54 16.42 V V00
2024-06-10 11:23:56 C 23 24 45.090 -01 54 15.48 V V00
2024-08-12 12:41:40 C 23 15 47.480 -01 54 07.81 X F52
2024-08-12 12:54:03 C 23 15 47.116 -01 54 09.77 X F52
2024-08-12 13:06:33 C 23 15 46.736 -01 54 11.75 X F52