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
2026-01-08 12:54:10 C 02 16 22.32 +16 58 49.6 V D29
2026-01-08 13:14:32 C 02 16 22.60 +16 58 48.9 V D29
2026-01-08 13:34:54 C 02 16 22.90 +16 58 48.3 V D29
2026-01-09 07:01:48 C 02 16 40.169 +16 58 21.79 V T05
2026-01-09 07:05:58 C 02 16 40.258 +16 58 21.43 V T05
2026-01-09 07:14:05 C 02 16 40.325 +16 58 20.68 V T05
2026-01-09 07:47:40 C 02 16 40.872 +16 58 20.14 V T05
2026-01-10 10:32:45 C 02 17 10.23 +16 57 49.3 V D29
2026-01-10 10:53:06 C 02 17 10.59 +16 57 48.9 V D29
2026-01-10 11:13:28 C 02 17 10.94 +16 57 48.6 V D29
2026-01-11 06:29:41 C 02 17 33.704 +16 57 38.57 X F52
2026-01-11 06:47:36 C 02 17 34.039 +16 57 38.39 X F52
2026-01-11 07:05:31 C 02 17 34.374 +16 57 38.21 X F52
2026-01-11 07:22:14 C 02 17 34.644 +16 57 38.56 V T05
2026-01-11 07:23:26 C 02 17 34.709 +16 57 38.02 X F52
2026-01-11 07:26:57 C 02 17 34.742 +16 57 38.20 V T05
2026-01-11 07:54:42 C 02 17 35.328 +16 57 37.51 V T05
2026-01-11 08:02:37 C 02 17 35.414 +16 57 38.30 V T05
2026-01-12 11:42:27 C 02 18 11.46 +16 57 34.8 V D29
2026-01-12 12:02:49 C 02 18 11.88 +16 57 35.0 V D29
2026-01-12 12:23:11 C 02 18 12.31 +16 57 35.2 V D29