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
2007-12-17 21:25:56 C 03 04 45.73 +21 52 58.4 c A24
2007-12-17 21:41:20 C 03 04 45.04 +21 52 53.9 c A24
2007-12-17 21:57:48 C 03 04 44.33 +21 52 49.4 c A24
2007-12-17 22:13:11 C 03 04 43.63 +21 52 45.3 c A24
2007-12-17 22:14:16 C 03 04 43.62 +21 52 44.6 c A24
2007-12-18 01:51:38 C 03 04 35.15 +21 51 46.9 o 691
2007-12-18 02:20:49 C 03 04 33.88 +21 51 39.2 o 691
2007-12-18 02:40:05 C 03 04 33.04 +21 51 34.0 o 691
2007-12-27 21:36:30 C 02 57 00.05 +20 52 45.3 c A24
2007-12-27 21:38:01 C 02 57 00.03 +20 52 45.2 c A24
2007-12-27 21:53:04 C 02 56 59.65 +20 52 41.5 c A24
2007-12-27 22:09:38 C 02 56 59.26 +20 52 37.7 c A24
2007-12-27 22:24:42 C 02 56 58.88 +20 52 34.0 c A24
2007-12-27 22:26:09 C 02 56 58.86 +20 52 33.8 c A24
2007-12-28 20:23:14 C 02 56 31.03 +20 47 47.6 c A24
2007-12-28 20:24:41 C 02 56 31.03 +20 47 47.5 c A24
2007-12-28 20:40:08 C 02 56 30.65 +20 47 44.1 c A24
2007-12-28 20:57:02 C 02 56 30.29 +20 47 40.4 c A24
2007-12-28 21:12:29 C 02 56 29.93 +20 47 37.0 c A24
2007-12-28 21:13:56 C 02 56 29.90 +20 47 36.5 c A24
2007-12-30 04:46:44 C 02 55 54.22 +20 41 02.4 r 703
2007-12-30 04:54:27 C 02 55 54.08 +20 41 00.4 r 703
2007-12-30 05:02:13 C 02 55 53.90 +20 40 59.4 r 703
2007-12-30 05:09:55 C 02 55 53.76 +20 40 57.3 r 703
2007-12-31 04:53:30 C 02 55 30.45 +20 36 13.0 18.4 c 704
2007-12-31 05:12:26 C 02 55 30.05 +20 36 09.1 18.9 c 704
2007-12-31 05:31:12 C 02 55 29.79 +20 36 04.9 18.5 c 704
2007-12-31 05:49:57 C 02 55 29.45 +20 36 00.9 18.4 c 704
2007-12-31 06:08:44 C 02 55 29.10 +20 35 57.0 18.5 c 704
2008-01-05 18:23:59 C 02 54 15.82 +20 12 55.4 r 084
2008-01-05 18:28:13 C 02 54 15.79 +20 12 54.6 r 084
2008-01-29 03:37:06 C 03 06 10.25 +19 45 58.5 18.6 c 704
2008-01-29 03:55:06 C 03 06 11.01 +19 45 59.0 18.7 c 704
2008-01-29 04:12:56 C 03 06 11.80 +19 46 00.4 18.8 c 704
2008-01-29 04:30:45 C 03 06 12.57 +19 46 00.2 18.9 c 704
2008-01-29 04:48:40 C 03 06 13.35 +19 46 01.3 18.8 c 704
2008-02-02 04:38:20 C 03 10 49.58 +19 51 45.4 r 703
2008-02-02 04:46:04 C 03 10 49.98 +19 51 44.4 r 703
2008-02-02 04:53:49 C 03 10 50.41 +19 51 46.5 r 703
2008-02-02 05:01:33 C 03 10 50.80 +19 51 47.7 r 703
2008-02-09 02:48:58 C 03 20 25.76 +20 07 13.5 r G96
2008-02-09 02:56:51 C 03 20 26.26 +20 07 14.4 r G96
2008-02-09 03:04:52 C 03 20 26.73 +20 07 15.2 r G96
2008-02-09 03:12:51 C 03 20 27.24 +20 07 15.9 r G96
2008-02-27 02:35:18 C 03 54 11.17 +21 07 48.5 18.9 c 704
2008-02-27 02:51:57 C 03 54 12.69 +21 07 50.1 19.1 c 704
2008-02-27 03:08:44 C 03 54 14.17 +21 07 53.6 18.8 c 704
2008-02-27 03:09:08 C 03 54 14.18 +21 07 53.9 r 703
2008-02-27 03:17:09 C 03 54 14.97 +21 07 54.5 r 703
2008-02-27 03:25:07 C 03 54 15.69 +21 07 55.5 r 703