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
2020-08-18 16:52:52 C 21 49 21.28 -11 09 30.8 q D29
2020-08-18 17:14:30 C 21 49 20.40 -11 09 35.2 q D29
2020-08-18 17:15:47 C 21 49 20.32 -11 09 35.0 q D29
2020-08-22 10:12:04 C 21 45 49.657 -11 26 26.84 U F51
2020-08-22 10:29:49 C 21 45 48.942 -11 26 30.13 U F51
2020-08-22 10:47:36 C 21 45 48.226 -11 26 33.68 U F51
2020-09-09 07:28:08 C 21 30 22.086 -12 40 39.45 U F51
2020-09-09 07:29:04 C 21 30 22.048 -12 40 39.61 U F51
2020-09-09 07:47:48 C 21 30 21.447 -12 40 42.34 U F51
2020-09-09 07:48:44 C 21 30 21.420 -12 40 42.43 U F51
2020-09-09 08:07:38 C 21 30 20.808 -12 40 45.54 U F51
2020-09-09 08:08:33 C 21 30 20.769 -12 40 45.41 U F51
2020-09-09 08:27:15 C 21 30 20.179 -12 40 48.31 U F51
2020-09-11 03:42:44 C 21 29 00.45 -12 47 12.9 V G96
2020-09-11 03:50:10 C 21 29 00.20 -12 47 14.2 V G96
2020-09-11 03:57:35 C 21 28 59.96 -12 47 15.3 V G96
2020-09-11 04:05:01 C 21 28 59.76 -12 47 15.8 V G96
2020-09-13 07:49:32 C 21 27 28.518 -12 54 34.87 U F51
2020-09-13 08:07:46 C 21 27 27.977 -12 54 37.45 U F51
2020-09-13 08:26:03 C 21 27 27.438 -12 54 39.85 U F51
2020-09-15 03:50:20 C 21 26 14.83 -13 00 31.9 V G96
2020-09-15 03:58:29 C 21 26 14.63 -13 00 32.5 V G96
2020-09-15 04:06:36 C 21 26 14.41 -13 00 33.7 V G96
2020-09-15 04:14:44 C 21 26 14.20 -13 00 33.6 V G96
2020-09-21 05:53:00 C 21 22 37.719 -13 18 07.60 U F51
2020-09-21 06:13:04 C 21 22 37.282 -13 18 09.67 U F51
2020-09-21 06:53:13 C 21 22 36.343 -13 18 14.27 U F51
2021-09-08 10:18:09 C 01 09 07.398 +11 21 58.10 U F52
2021-09-08 10:33:01 C 01 09 06.984 +11 21 56.46 U F52
2021-09-08 10:47:53 C 01 09 06.571 +11 21 54.87 U F52
2021-09-08 11:02:46 C 01 09 06.154 +11 21 53.03 U F52
2021-09-09 07:44:51 C 01 08 32.23 +11 19 25.8 V G96
2021-09-09 07:52:57 C 01 08 31.99 +11 19 24.6 V G96
2021-09-09 08:01:03 C 01 08 31.77 +11 19 24.2 V G96
2021-09-09 08:09:10 C 01 08 31.55 +11 19 23.5 V G96
2021-09-11 10:34:30 C 01 07 05.066 +11 12 59.61 U F52
2021-09-11 10:52:56 C 01 07 04.507 +11 12 57.22 U F52
2021-09-11 11:11:25 C 01 07 03.937 +11 12 54.69 U F52
2021-09-11 11:30:00 C 01 07 03.372 +11 12 52.31 U F52
2021-09-27 08:51:55 C 00 53 36.684 +10 04 31.95 U F51
2021-09-27 09:07:48 C 00 53 36.027 +10 04 28.46 U F51
2021-09-27 09:23:42 C 00 53 35.369 +10 04 25.10 U F51
2021-09-27 09:39:45 C 00 53 34.725 +10 04 21.46 U F51
2021-09-29 17:39:57 C 00 51 18.53 +09 51 40.0 V D29
2021-09-29 18:00:19 C 00 51 17.74 +09 51 35.8 V D29
2021-09-29 18:20:41 C 00 51 16.85 +09 51 31.3 V D29
2021-10-02 07:31:36 C 00 48 45.387 +09 37 03.35 U F52
2021-10-02 07:48:03 C 00 48 44.686 +09 36 59.40 U F52
2021-10-02 08:20:52 C 00 48 43.284 +09 36 51.53 U F52
2021-10-07 05:18:18 C 00 43 47.05 +09 07 38.4 V G96