138859 (2000 WN63)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5314892165 ± 2.53e-08
Semi-major axis (a)1.5731873110 AU ± 2.19e-09
Inclination (i)13.15514140° ± 3.83e-06
Long. of Asc. Node (Ω)55.86017010° ± 1.45e-05
Arg. of Perihelion (ω)144.43452672° ± 1.51e-05
Mean Anomaly (M)145.21848952° ± 3.79e-06
Mean Motion (n)0.4995070520°/day ± 1.04e-09
Perihelion dist (q)0.73705522 AU ± 3.98e-08
Aphelion dist (Q)2.40931940 AU ± 3.99e-08
Orbital Period1.97319793 yr ± 4.12e-09
Physical Parameters
H (abs. magnitude)18.98
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.267″
Uncertainty0
Orbit TypeApollo
MOID0.141493 AU
Observations Used287
Oppositions12
Arc Total2000-2025
First Observation Used2000-11-27
Last Observation Used2025-09-29
Observations (324)
Date Type RA Dec Mag Band Observatory
2023-09-07 10:50:40 C 00 23 11.687 -22 19 25.83 X F52
2023-09-07 11:08:17 C 00 23 10.350 -22 19 32.85 X F52
2023-09-07 11:25:51 C 00 23 09.010 -22 19 39.26 X F52
2023-09-15 10:24:39 C 00 08 45.338 -23 22 07.28 X F51
2023-09-15 10:56:54 C 00 08 42.813 -23 22 15.77 X F51
2023-09-15 11:15:32 C 00 08 41.360 -23 22 20.84 X F51
2023-09-20 10:36:49 C 23 59 38.738 -23 49 02.93 X F51
2023-09-20 10:53:47 C 23 59 37.422 -23 49 05.85 X F51
2023-09-20 11:10:45 C 23 59 36.112 -23 49 08.94 X F51
2024-11-29 12:29:08 C 11 41 38.641 +18 57 42.84 V G96
2024-11-29 12:36:05 C 11 41 40.322 +18 57 35.53 V G96
2024-11-29 12:43:02 C 11 41 41.932 +18 57 28.44 V G96
2024-11-29 12:49:59 C 11 41 43.555 +18 57 22.07 V G96
2025-08-27 12:56:47 C 00 51 58.337 -17 59 53.46 X F52
2025-08-27 13:14:23 C 00 51 57.328 -18 00 01.93 X F52
2025-08-27 13:31:56 C 00 51 56.321 -18 00 09.94 X F52
2025-08-27 13:49:32 C 00 51 55.313 -18 00 18.32 X F52
2025-09-17 10:36:28 C 00 18 20.291 -21 16 38.34 X F51
2025-09-17 11:06:32 C 00 18 18.024 -21 16 46.62 X F51
2025-09-17 11:22:56 C 00 18 16.776 -21 16 50.96 X F51
2025-09-17 11:39:19 C 00 18 15.523 -21 16 55.28 X F51
2025-09-29 08:20:23 C 23 57 47.679 -22 08 27.57 X F52
2025-09-29 08:36:57 C 23 57 46.526 -22 08 29.20 X F52
2025-09-29 09:10:18 C 23 57 44.176 -22 08 31.76 X F52