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
2020-08-04 12:13:01 C 00 30 27.79 +22 49 12.0 V T08
2020-08-04 12:58:37 C 00 30 42.37 +22 51 56.2 V T08
2020-08-04 13:05:11 C 00 30 44.49 +22 52 19.5 V T08
2020-08-04 21:26:56 C 00 33 37.67 +23 21 15.7 V L18
2020-08-04 21:29:56 C 00 33 38.79 +23 21 26.7 V L18
2020-08-04 21:32:56 C 00 33 39.73 +23 21 37.0 V L18
2020-08-04 23:41:36 C 00 34 23.85 +23 29 20.9 V C95
2020-08-05 00:12:25 C 00 34 34.16 +23 31 12.9 V C95
2020-08-06 23:55:32 C 00 51 27.34 +26 17 41.0 V A17
2020-08-07 00:07:28 C 00 51 31.55 +26 18 22.8 V A17
2020-08-07 00:19:24 C 00 51 35.77 +26 19 04.7 V A17
2020-08-08 11:46:20 C 01 04 43.48 +28 19 03.6 V T08
2020-08-08 11:48:59 C 01 04 44.46 +28 19 12.8 V T08
2020-08-08 11:53:41 C 01 04 46.15 +28 19 28.8 V T08
2020-08-08 12:17:53 C 01 04 54.84 +28 20 50.2 V T08
2020-08-10 02:39:24 C 01 19 34.44 +30 23 41.2 V 160
2020-08-10 02:42:22 C 01 19 35.52 +30 23 49.2 V 160
2020-08-10 02:45:19 C 01 19 36.63 +30 23 57.5 V 160
2020-08-10 13:00:36 C 01 23 38.40 +30 56 08.5 V T05
2020-08-10 13:01:16 C 01 23 38.61 +30 56 10.6 V T05
2020-08-10 13:04:43 C 01 23 39.92 +30 56 21.3 V T05
2020-08-10 13:05:22 C 01 23 40.13 +30 56 23.4 V T05
2020-08-10 13:08:46 C 01 23 41.39 +30 56 34.0 V T05
2020-08-10 13:09:26 C 01 23 41.65 +30 56 36.2 V T05
2020-08-10 13:19:41 C 01 23 45.43 +30 57 07.7 V T05
2020-08-10 13:21:57 C 01 23 46.28 +30 57 15.1 V T05
2020-08-12 13:11:22 C 01 42 49.69 +33 17 12.1 V T08
2020-08-12 13:14:01 C 01 42 50.67 +33 17 19.8 V T08
2020-08-12 13:18:00 C 01 42 52.23 +33 17 30.9 V T08
2020-08-12 15:09:09 C 01 43 34.51 +33 22 41.6 V T08
2020-08-12 19:27:27 C 01 45 23.92 +33 34 02.1 V N31
2020-08-12 19:41:04 C 01 45 29.12 +33 34 43.8 V N31
2020-08-13 14:09:26 C 01 52 56.953 +34 24 36.17 U F51
2020-08-13 14:09:52 C 01 52 57.102 +34 24 37.14 U F52
2020-08-13 14:24:36 C 01 53 02.752 +34 25 15.89 U F51
2020-08-13 14:38:34 C 01 53 08.144 +34 25 52.74 U F52
2020-08-13 14:38:55 C 01 53 08.300 +34 25 53.79 U F51
2020-08-13 14:59:31 C 01 53 16.198 +34 26 47.37 U F52
2020-08-17 01:25:57 C 02 27 17.85 +37 37 19.9 V 160
2020-08-17 01:29:01 C 02 27 19.09 +37 37 26.3 V 160
2020-08-17 01:32:28 C 02 27 20.46 +37 37 33.5 V 160
2020-08-17 13:19:07 C 02 32 12.51 +38 01 19.5 V T08
2020-08-17 13:23:12 C 02 32 14.13 +38 01 27.9 V T08
2020-08-17 13:27:50 C 02 32 16.00 +38 01 36.8 V T08
2020-08-17 13:42:31 C 02 32 21.70 +38 02 07.6 V T08
2020-08-19 13:03:04 C 02 51 50.43 +39 25 06.1 V T05
2020-08-19 13:14:24 C 02 51 54.84 +39 25 25.9 V T05
2020-08-19 13:29:45 C 02 52 00.77 +39 25 51.2 V T05
2020-08-19 13:38:22 C 02 52 04.10 +39 26 06.1 V T05
2020-08-21 13:46:29 C 03 11 30.36 +40 33 59.3 V T08