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
2001-04-26 13:54:25 C 14 54 00.87 -26 01 23.7 322
2001-04-26 14:02:43 C 14 54 00.56 -26 01 21.5 322
2001-04-26 14:56:56 C 14 53 58.41 -26 01 06.0 322
2001-04-26 15:05:13 C 14 53 58.05 -26 01 03.4 322
2001-04-26 15:54:48 C 14 53 56.10 -26 00 48.7 322
2001-04-26 16:03:06 C 14 53 55.75 -26 00 46.0 322
2001-04-26 16:34:54 C 14 53 54.44 -26 00 36.6 322
2001-04-26 16:42:22 C 14 53 54.15 -26 00 34.2 322
2001-05-24 05:22:59 C 14 37 26.24 -22 20 17.5 17.5 c 704
2001-05-24 05:40:48 C 14 37 26.03 -22 20 11.5 19.0 c 704
2001-05-24 05:59:44 C 14 37 25.86 -22 20 06.1 18.8 c 704
2001-05-24 06:33:08 C 14 37 25.32 -22 19 54.8 18.6 c 704
2001-06-11 04:28:13 C 14 39 34.19 -20 49 46.4 c 699
2001-06-11 05:06:23 C 14 39 34.76 -20 49 41.6 c 699
2001-06-11 05:44:43 C 14 39 35.28 -20 49 36.5 c 699
2001-06-11 06:23:12 C 14 39 35.85 -20 49 31.1 c 699
2001-06-16 04:10:38 C 14 41 57.13 -20 36 09.3 18.7 c 704
2001-06-16 04:31:46 C 14 41 57.55 -20 36 07.6 18.5 c 704
2001-06-16 05:26:58 C 14 41 58.79 -20 36 01.5 19.2 c 704
2001-06-20 04:08:27 C 14 44 21.09 -20 28 31.3 c 699
2001-06-20 04:46:35 C 14 44 21.81 -20 28 29.1 c 699
2001-06-20 05:24:48 C 14 44 22.88 -20 28 27.9 c 699
2001-06-20 06:03:09 C 14 44 23.80 -20 28 24.9 c 699
2001-06-22 04:49:41 C 14 45 43.22 -20 25 44.8 17.4 c 704
2001-06-22 05:11:45 C 14 45 43.80 -20 25 43.9 17.8 c 704
2001-06-22 05:48:57 C 14 45 44.92 -20 25 41.4 17.4 c 704
2001-07-12 06:18:43 C 15 04 01.77 -20 29 59.9 20.6 c 608
2001-07-12 06:34:02 C 15 04 02.44 -20 30 01.5 20.4 c 608
2001-07-12 06:49:45 C 15 04 03.12 -20 30 01.0 19.8 c 608
2002-08-12 06:42:54 C 22 08 30.95 -09 23 28.8 c 807
2002-08-12 08:37:25 C 22 08 26.44 -09 23 51.0 c 807
2002-08-13 07:38:21 C 22 07 33.97 -09 28 16.0 d 291
2002-08-13 08:09:05 C 22 07 32.76 -09 28 21.4 d 291
2002-08-13 08:38:25 C 22 07 31.61 -09 28 27.4 d 291
2003-10-16 05:05:19 C 00 54 15.77 +10 27 12.8 c 691
2003-10-16 05:44:44 C 00 54 13.99 +10 27 02.2 c 691
2003-10-16 06:24:52 C 00 54 12.19 +10 26 51.5 c 691
2003-10-22 04:50:08 C 00 48 01.72 +09 47 57.8 c 691
2003-10-22 05:28:11 C 00 48 00.07 +09 47 47.3 c 691
2003-10-22 06:10:50 C 00 47 58.20 +09 47 35.5 c 691
2005-06-16 08:48:53 C 20 14 07.84 -20 44 16.1 c 691
2005-06-16 09:14:06 C 20 14 06.89 -20 44 18.3 c 691
2005-06-16 09:39:21 C 20 14 05.93 -20 44 20.6 c 691
2005-06-26 09:01:52 C 20 04 07.08 -21 06 58.7 20.1 o 644
2005-06-26 09:03:18 C 20 04 06.96 -21 06 59.2 r G96
2005-06-26 09:13:41 C 20 04 06.49 -21 07 00.7 r G96
2005-06-26 09:20:23 C 20 04 06.20 -21 07 00.8 19.8 o 644
2005-06-26 09:24:03 C 20 04 06.02 -21 07 00.9 r G96
2005-06-26 09:34:34 C 20 04 05.52 -21 07 02.7 r G96
2005-06-26 09:37:22 C 20 04 05.42 -21 07 02.1 19.8 o 644