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
2008-06-13 04:02:32 C 10 00 17.49 +09 15 08.4 r 703
2008-06-13 04:09:12 C 10 00 18.46 +09 15 04.1 r 703
2008-06-28 09:20:38 C 10 54 05.22 +03 59 50.4 r E12
2008-06-28 09:26:39 C 10 54 06.12 +03 59 45.5 r E12
2008-06-28 09:32:13 C 10 54 06.80 +03 59 41.1 r E12
2008-06-28 09:37:54 C 10 54 07.63 +03 59 36.0 r E12
2009-07-13 08:53:56 C 21 44 01.22 -12 30 53.4 o 691
2009-07-13 09:51:44 C 21 43 59.31 -12 31 00.0 o 691
2009-07-27 06:23:32 C 21 32 08.73 -13 20 25.8 o 691
2009-07-27 06:49:01 C 21 32 07.73 -13 20 30.0 o 691
2009-07-31 06:42:49 C 21 28 17.31 -13 36 35.4 o 691
2009-07-31 07:08:19 C 21 28 16.25 -13 36 39.5 o 691
2009-07-31 07:30:20 C 21 28 15.35 -13 36 43.4 o 691
2010-10-02 04:03:04 C 00 05 06.67 +04 37 44.9 o 691
2010-10-02 04:28:46 C 00 05 05.67 +04 37 37.9 o 691
2010-10-08 03:34:10 C 23 59 30.92 +04 01 28.5 o 691
2010-10-08 04:04:51 C 23 59 29.76 +04 01 20.7 o 691
2010-10-08 04:35:30 C 23 59 28.52 +04 01 13.0 o 691
2010-11-05 03:35:35 C 23 39 26.24 +01 36 42.8 r G96
2010-11-05 03:46:24 C 23 39 26.02 +01 36 41.3 r G96
2010-11-05 03:57:23 C 23 39 25.77 +01 36 39.6 r G96
2010-11-05 04:08:24 C 23 39 25.56 +01 36 37.8 r G96
2011-09-18 12:07:56 C 08 15 01.40 +20 54 52.1 r G96
2011-09-18 12:09:56 C 08 15 01.65 +20 54 50.9 r G96
2011-09-18 12:11:56 C 08 15 01.90 +20 54 50.1 r G96
2011-09-18 12:13:54 C 08 15 02.19 +20 54 49.5 r G96
2011-10-24 11:58:19 C 10 14 36.70 +11 07 24.6 o 691
2011-10-24 12:16:40 C 10 14 39.28 +11 07 08.8 o 691
2011-10-24 12:34:58 C 10 14 41.88 +11 06 52.7 o 691
2011-10-30 11:50:53 C 10 35 12.91 +08 56 30.1 r G96
2011-10-30 12:02:34 C 10 35 14.60 +08 56 19.1 r G96
2011-10-30 12:14:24 C 10 35 16.26 +08 56 08.0 r G96
2011-10-30 12:26:17 C 10 35 17.95 +08 55 56.9 r G96
2011-11-23 12:04:26 C 11 59 03.04 -00 46 38.2 r 703
2011-11-23 12:11:12 C 11 59 04.09 -00 46 45.6 r 703
2011-11-23 12:17:53 C 11 59 04.99 -00 46 51.8 r 703
2013-08-12 10:57:59 C 22 41 29.485 -05 47 37.42 L F51
2013-08-12 11:20:18 C 22 41 28.698 -05 47 41.36 L F51
2013-08-12 12:03:29 C 22 41 27.175 -05 47 49.21 L F51
2013-08-28 05:16:15 C 22 27 35.61 -07 01 58.7 q G96
2013-08-28 05:23:02 C 22 27 35.37 -07 02 00.2 q G96
2013-08-28 05:29:49 C 22 27 35.09 -07 02 01.4 q G96
2013-08-28 05:36:35 C 22 27 34.86 -07 02 03.3 q G96
2013-08-28 08:55:45 C 22 27 27.08 -07 02 44.1 q G96
2013-08-28 08:59:21 C 22 27 26.91 -07 02 44.6 q G96
2013-08-28 09:02:57 C 22 27 26.80 -07 02 44.7 q G96
2013-08-28 09:06:36 C 22 27 26.70 -07 02 45.3 q G96
2014-09-20 08:46:22 C 02 14 02.64 +17 43 36.9 u H21
2014-09-20 08:51:00 C 02 14 02.57 +17 43 36.4 u H21
2014-09-20 08:55:40 C 02 14 02.48 +17 43 36.3 u H21