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
2020-07-28 23:44:37 C 23 42 31.93 +13 34 29.6 V L18
2020-07-28 23:44:57 C 23 42 32.01 +13 34 30.6 V L18
2020-07-28 23:45:17 C 23 42 32.10 +13 34 31.8 V L18
2020-07-28 23:45:37 C 23 42 32.18 +13 34 33.0 V L18
2020-07-28 23:45:57 C 23 42 32.26 +13 34 34.1 V L18
2020-07-28 23:46:17 C 23 42 32.36 +13 34 35.1 V L18
2020-07-28 23:46:37 C 23 42 32.44 +13 34 36.1 V L18
2020-07-28 23:46:57 C 23 42 32.53 +13 34 37.4 V L18
2020-07-28 23:47:17 C 23 42 32.62 +13 34 38.6 V L18
2020-07-28 23:47:37 C 23 42 32.75 +13 34 39.8 V L18
2020-07-28 23:48:17 C 23 42 32.89 +13 34 41.9 V L18
2020-07-28 23:48:37 C 23 42 32.98 +13 34 43.1 V L18
2020-07-28 23:48:57 C 23 42 33.05 +13 34 44.4 V L18
2020-07-28 23:49:17 C 23 42 33.13 +13 34 45.3 V L18
2020-07-29 01:19:01 C 23 42 57.55 +13 39 58.4 V 160
2020-07-29 01:21:54 C 23 42 58.26 +13 40 08.2 V 160
2020-07-29 01:24:49 C 23 42 59.03 +13 40 18.1 V 160
2020-07-29 09:17:04 C 23 45 09.75 +14 07 34.4 V G96
2020-07-29 09:24:30 C 23 45 11.70 +14 08 00.2 V G96
2020-07-29 09:31:56 C 23 45 13.64 +14 08 25.9 V G96
2020-07-29 09:39:23 C 23 45 15.60 +14 08 51.7 V G96
2020-07-29 13:47:54 C 23 46 23.72 +14 23 24.5 V T05
2020-07-29 14:37:16 C 23 46 36.62 +14 26 14.9 V T05
2020-07-29 15:05:52 C 23 46 44.10 +14 27 53.0 V T05
2020-07-30 00:43:22 C 23 49 29.96 +15 00 53.7 V 160
2020-07-30 00:46:24 C 23 49 30.78 +15 01 04.6 V 160
2020-07-30 00:49:27 C 23 49 31.61 +15 01 15.6 V 160
2020-07-31 01:43:07 C 23 56 42.64 +16 28 37.2 V 160
2020-07-31 01:46:05 C 23 56 43.47 +16 28 47.6 V 160
2020-07-31 01:49:06 C 23 56 44.32 +16 28 58.4 V 160
2020-07-31 11:41:39 C 23 59 41.44 +17 04 20.1 V T08
2020-07-31 11:59:50 C 23 59 46.55 +17 05 25.4 V T08
2020-07-31 12:09:37 C 23 59 49.28 +17 06 00.5 V T08
2020-07-31 12:16:38 C 23 59 51.26 +17 06 25.8 V T08
2020-08-01 09:54:41 C 00 06 24.07 +18 23 11.4 V 703
2020-08-01 10:00:22 C 00 06 25.73 +18 23 32.3 V 703
2020-08-01 10:06:04 C 00 06 27.38 +18 23 52.0 V 703
2020-08-01 10:11:46 C 00 06 29.09 +18 24 12.5 V 703
2020-08-02 21:56:21 C 00 17 47.69 +20 31 44.5 q L18
2020-08-02 21:57:47 C 00 17 48.16 +20 31 49.9 q L18
2020-08-02 21:59:13 C 00 17 48.58 +20 31 53.8 q L18
2020-08-02 22:00:39 C 00 17 49.08 +20 31 59.1 q L18
2020-08-02 22:02:05 C 00 17 49.53 +20 32 05.1 q L18
2020-08-02 22:03:31 C 00 17 50.08 +20 32 10.3 q L18
2020-08-03 22:30:43 C 00 25 51.57 +21 59 41.9 V L18
2020-08-03 22:32:08 C 00 25 51.97 +21 59 46.6 V L18
2020-08-03 22:35:00 C 00 25 52.94 +21 59 56.9 V L18
2020-08-03 22:36:26 C 00 25 53.45 +22 00 02.8 V L18
2020-08-03 22:37:52 C 00 25 53.88 +22 00 07.5 V L18
2020-08-04 12:10:22 C 00 30 26.94 +22 49 02.6 V T08