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
2005-06-28 07:47:46 C 20 01 56.06 -21 11 42.2 r G96
2005-06-28 07:53:40 C 20 01 55.74 -21 11 42.9 r G96
2005-06-28 07:59:26 C 20 01 55.45 -21 11 43.8 r G96
2005-06-28 08:05:10 C 20 01 55.20 -21 11 44.2 r G96
2006-07-29 07:14:51 C 23 33 11.53 -00 12 14.1 21.8 c H55
2006-07-29 07:20:21 C 23 33 11.50 -00 12 15.4 21.8 c H55
2006-07-29 07:25:50 C 23 33 11.35 -00 12 15.1 21.8 c H55
2006-08-19 10:06:16 C 23 20 37.20 -01 13 56.4 c 691
2006-08-19 10:31:19 C 23 20 36.36 -01 14 01.2 c 691
2006-08-28 08:44:38 C 23 13 20.72 -01 54 06.7 c 691
2006-08-28 09:09:39 C 23 13 19.81 -01 54 11.7 c 691
2006-08-28 09:34:40 C 23 13 18.91 -01 54 16.6 c 691
2006-08-29 07:44:47 C 23 12 31.31 -01 58 47.0 c 691
2006-08-29 08:09:42 C 23 12 30.37 -01 58 51.5 c 691
2006-08-29 08:34:38 C 23 12 29.44 -01 58 56.8 c 691
2006-09-27 06:21:29 C 22 47 19.50 -04 29 17.9 r G96
2006-09-27 06:31:56 C 22 47 19.17 -04 29 20.1 r G96
2006-09-27 06:42:22 C 22 47 18.81 -04 29 22.2 r G96
2006-09-27 06:52:54 C 22 47 18.45 -04 29 24.5 r G96
2006-10-19 04:00:22 C 22 34 08.40 -05 56 06.4 r G96
2006-10-19 04:09:54 C 22 34 08.18 -05 56 07.0 r G96
2006-10-19 04:19:24 C 22 34 08.04 -05 56 08.8 r G96
2006-10-19 04:29:04 C 22 34 07.86 -05 56 10.0 r G96
2007-10-21 09:11:45 C 04 10 29.89 +25 37 20.3 r G96
2007-10-21 09:18:23 C 04 10 29.78 +25 37 20.1 r G96
2007-10-21 09:24:59 C 04 10 29.67 +25 37 20.4 r G96
2007-10-21 09:31:39 C 04 10 29.53 +25 37 20.5 r G96
2007-10-24 07:30:44 C 04 09 10.38 +25 38 20.3 19.0 c 704
2007-10-24 07:47:32 C 04 09 09.99 +25 38 19.9 19.8 c 704
2007-10-24 08:04:22 C 04 09 09.53 +25 38 21.9 19.5 c 704
2007-10-24 08:21:14 C 04 09 09.15 +25 38 20.6 19.2 c 704
2007-10-31 23:17:50 C 04 04 05.13 +25 35 27.3 c A24
2007-10-31 23:27:48 C 04 04 04.89 +25 35 27.9 c A24
2007-10-31 23:31:36 C 04 04 04.71 +25 35 27.8 c A24
2007-10-31 23:59:09 C 04 04 03.74 +25 35 26.4 c A24
2007-11-01 10:32:50 C 04 03 41.48 +25 35 00.1 18.6 c 704
2007-11-01 11:26:28 C 04 03 39.49 +25 35 00.1 19.3 c 704
2007-11-01 11:44:11 C 04 03 38.89 +25 34 58.2 19.5 c 704
2007-11-02 07:11:58 C 04 02 57.90 +25 34 05.4 o 691
2007-11-02 07:37:24 C 04 02 56.93 +25 34 04.3 o 691
2007-11-02 08:02:50 C 04 02 55.96 +25 34 03.0 o 691
2007-11-05 14:43:36 C 03 59 52.49 +25 29 18.9 r D29
2007-11-05 15:07:24 C 03 59 51.47 +25 29 17.2 r D29
2007-11-05 15:38:54 C 03 59 50.12 +25 29 14.8 r D29
2007-11-05 16:00:57 C 03 59 49.15 +25 29 13.3 r D29
2007-11-06 07:24:10 C 03 59 10.14 +25 28 04.5 18.6 c 704
2007-11-06 07:41:53 C 03 59 09.38 +25 28 04.4 18.8 c 704
2007-11-06 07:59:21 C 03 59 08.59 +25 28 02.7 18.6 c 704
2007-11-06 08:16:54 C 03 59 07.85 +25 28 01.0 18.8 c 704
2007-11-06 08:34:48 C 03 59 07.02 +25 28 00.1 18.5 c 704