380128 (1997 WB21)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3169446759 ± 1.36e-08
Semi-major axis (a)1.4597153168 AU ± 5.48e-10
Inclination (i)3.39067640° ± 1.59e-06
Long. of Asc. Node (Ω)280.94587240° ± 1.87e-05
Arg. of Perihelion (ω)81.97198818° ± 2.01e-05
Mean Anomaly (M)337.91299271° ± 2.86e-06
Mean Motion (n)0.5588690105°/day ± 3.14e-10
Perihelion dist (q)0.99706632 AU ± 1.99e-08
Aphelion dist (Q)1.92236431 AU ± 1.99e-08
Orbital Period1.76360876 yr ± 9.92e-10
Physical Parameters
H (abs. magnitude)20.27
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.298″
Uncertainty0
Orbit TypeApollo
MOID0.050702 AU
Observations Used398
Oppositions12
Arc Total1997-2025
First Observation Used1997-11-26
Last Observation Used2025-04-28
Observations (422)
Date Type RA Dec Mag Band Observatory
2021-01-08 06:39:29 C 06 21 39.81 +22 45 18.1 V G96
2021-01-09 04:12:25 C 06 20 24.44 +22 40 16.7 U I41
2021-01-09 06:47:45 C 06 20 14.75 +22 39 42.4 U I41
2021-01-09 06:51:50 C 06 20 14.49 +22 39 41.4 U I41
2021-01-09 07:00:34 C 06 20 13.94 +22 39 39.5 U I41
2021-01-09 08:24:51 C 06 20 08.71 +22 39 19.7 U I41
2021-01-18 03:25:46 C 06 10 54.38 +21 56 22.5 V G96
2021-01-18 03:33:47 C 06 10 54.09 +21 56 21.3 V G96
2021-01-18 03:41:49 C 06 10 53.82 +21 56 19.7 V G96
2021-01-18 03:49:50 C 06 10 53.54 +21 56 18.7 V G96
2023-03-13 05:45:44 C 10 27 49.158 +02 47 59.32 V G96
2023-03-13 05:53:47 C 10 27 48.625 +02 48 00.94 V G96
2023-03-13 06:01:52 C 10 27 48.128 +02 48 04.90 V G96
2023-03-13 06:09:55 C 10 27 47.668 +02 48 08.17 V G96
2025-03-25 09:28:30 C 13 33 00.776 -17 01 31.38 V G37
2025-03-25 10:09:32 C 13 32 58.424 -17 01 22.38 V G37
2025-03-29 10:56:44 C 13 27 21.427 -16 37 40.15 X F52
2025-03-29 11:14:10 C 13 27 20.306 -16 37 35.57 X F52
2025-03-29 11:49:07 C 13 27 18.113 -16 37 26.26 X F52
2025-04-28 07:27:15 C 12 40 32.026 -11 46 37.84 X F51
2025-04-28 08:00:52 C 12 40 30.067 -11 46 22.86 X F51
2025-04-28 08:17:43 C 12 40 29.083 -11 46 15.30 X F51