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
2020-07-20 12:56:55 C 22 54 29.42 +03 07 50.5 V T05
2020-07-22 12:17:10 C 23 04 29.06 +05 20 40.6 V T08
2020-07-22 12:19:49 C 23 04 29.60 +05 20 48.3 V T08
2020-07-22 12:25:08 C 23 04 30.67 +05 21 03.8 V T08
2020-07-22 12:33:12 C 23 04 32.31 +05 21 27.2 V T08
2020-07-23 12:20:55 C 23 09 49.392 +06 31 31.34 U F52
2020-07-23 12:38:32 C 23 09 53.102 +06 32 24.20 U F52
2020-07-23 12:56:12 C 23 09 56.820 +06 33 17.24 U F52
2020-07-23 13:13:48 C 23 10 00.510 +06 34 09.89 U F52
2020-07-23 22:05:23 C 23 12 03.12 +07 00 23.7 U L18
2020-07-23 22:07:23 C 23 12 03.58 +07 00 29.9 U L18
2020-07-23 22:09:23 C 23 12 04.01 +07 00 35.7 U L18
2020-07-23 22:11:23 C 23 12 04.48 +07 00 42.3 U L18
2020-07-23 22:13:23 C 23 12 04.88 +07 00 47.7 U L18
2020-07-23 22:15:23 C 23 12 05.38 +07 00 54.1 U L18
2020-07-23 22:17:23 C 23 12 05.76 +07 00 59.8 U L18
2020-07-23 22:19:23 C 23 12 06.24 +07 01 05.8 U L18
2020-07-23 22:21:22 C 23 12 06.67 +07 01 12.3 U L18
2020-07-23 22:23:22 C 23 12 07.10 +07 01 18.6 U L18
2020-07-26 01:02:25 C 23 24 08.85 +09 39 31.2 V 160
2020-07-26 01:05:22 C 23 24 09.54 +09 39 40.7 V 160
2020-07-26 01:08:20 C 23 24 10.24 +09 39 50.5 V 160
2020-07-26 09:26:53 C 23 26 14.00 +10 06 50.1 V G96
2020-07-26 09:34:19 C 23 26 15.74 +10 07 14.3 V G96
2020-07-26 09:41:45 C 23 26 17.49 +10 07 38.4 V G96
2020-07-26 09:49:12 C 23 26 19.24 +10 08 02.7 V G96
2020-07-28 01:18:27 C 23 36 29.13 +12 18 22.4 V 160
2020-07-28 01:21:18 C 23 36 29.85 +12 18 32.0 V 160
2020-07-28 01:24:08 C 23 36 30.58 +12 18 41.6 V 160
2020-07-28 06:11:33 C 23 37 48.54 +12 34 51.4 V V93
2020-07-28 06:53:45 C 23 37 59.33 +12 37 14.9 V V93
2020-07-28 07:35:13 C 23 38 09.90 +12 39 36.2 V V93
2020-07-28 08:17:00 C 23 38 21.74 +12 42 05.1 V 703
2020-07-28 08:22:52 C 23 38 23.23 +12 42 25.9 V 703
2020-07-28 08:28:44 C 23 38 24.74 +12 42 45.1 V 703
2020-07-28 08:34:36 C 23 38 26.19 +12 43 05.3 V 703
2020-07-28 23:39:56 C 23 42 30.73 +13 34 13.4 V L18
2020-07-28 23:40:17 C 23 42 30.80 +13 34 15.3 V L18
2020-07-28 23:40:37 C 23 42 30.87 +13 34 15.2 V L18
2020-07-28 23:40:57 C 23 42 30.96 +13 34 16.9 V L18
2020-07-28 23:41:17 C 23 42 31.06 +13 34 17.9 V L18
2020-07-28 23:41:37 C 23 42 31.11 +13 34 19.2 V L18
2020-07-28 23:41:57 C 23 42 31.21 +13 34 20.2 V L18
2020-07-28 23:42:17 C 23 42 31.30 +13 34 21.4 V L18
2020-07-28 23:42:37 C 23 42 31.41 +13 34 22.3 V L18
2020-07-28 23:42:57 C 23 42 31.48 +13 34 24.1 V L18
2020-07-28 23:43:17 C 23 42 31.59 +13 34 25.0 V L18
2020-07-28 23:43:37 C 23 42 31.69 +13 34 26.1 V L18
2020-07-28 23:43:57 C 23 42 31.77 +13 34 27.2 V L18
2020-07-28 23:44:17 C 23 42 31.83 +13 34 28.7 V L18