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
2020-10-23 15:14:50 C 07 49 59.43 +32 12 47.4 V T08
2020-10-28 11:58:47 C 07 55 21.52 +31 16 34.0 V G96
2020-10-28 12:05:02 C 07 55 21.71 +31 16 31.2 V G96
2020-10-28 12:11:15 C 07 55 21.90 +31 16 28.5 V G96
2020-10-28 12:17:29 C 07 55 22.08 +31 16 25.4 V G96
2020-11-10 13:39:35 C 08 01 17.89 +29 07 11.0 V T05
2020-11-10 13:45:30 C 08 01 17.83 +29 07 08.5 V T05
2020-11-10 13:53:45 C 08 01 17.70 +29 07 05.1 V T05
2020-11-10 14:35:03 C 08 01 17.25 +29 06 51.9 V T05
2020-11-27 11:46:33 C 07 48 11.306 +27 03 50.74 U F52
2020-11-27 12:04:50 C 07 48 10.013 +27 03 46.70 U F52
2020-11-27 12:23:03 C 07 48 08.721 +27 03 42.41 U F52
2020-11-27 12:41:09 C 07 48 07.434 +27 03 38.07 U F52
2020-11-29 06:27:56 C 07 45 26.67 +26 52 43.2 V G96
2020-11-29 06:36:01 C 07 45 26.07 +26 52 41.4 V G96
2020-11-29 06:44:05 C 07 45 25.51 +26 52 39.8 V G96
2020-11-29 06:52:09 C 07 45 24.90 +26 52 38.4 V G96
2020-12-10 08:25:04 C 07 23 29.55 +25 46 46.1 U I41
2020-12-10 08:34:22 C 07 23 28.59 +25 46 43.9 U I41
2020-12-10 11:58:49 C 07 23 07.67 +25 45 51.9 U I41
2020-12-10 12:05:34 C 07 23 06.98 +25 45 50.1 U I41
2020-12-14 07:58:07 C 07 14 10.15 +25 22 34.0 V 703
2020-12-14 08:06:05 C 07 14 09.21 +25 22 31.2 V 703
2020-12-14 08:14:03 C 07 14 08.35 +25 22 30.1 V 703
2020-12-14 08:22:01 C 07 14 07.51 +25 22 27.8 V 703
2020-12-16 07:27:00 C 07 09 24.62 +25 10 14.7 V G96
2020-12-16 07:34:31 C 07 09 23.81 +25 10 12.9 V G96
2020-12-16 07:42:01 C 07 09 23.00 +25 10 11.0 V G96
2020-12-16 07:49:31 C 07 09 22.17 +25 10 09.1 V G96
2020-12-21 07:05:33 C 06 57 23.74 +24 38 23.2 V 703
2020-12-21 07:13:34 C 06 57 23.04 +24 38 21.5 V 703
2020-12-21 07:21:35 C 06 57 22.13 +24 38 20.1 V 703
2020-12-23 07:07:27 C 06 52 40.70 +24 25 22.9 V G96
2020-12-23 07:15:33 C 06 52 39.86 +24 25 20.7 V G96
2020-12-23 07:23:39 C 06 52 39.03 +24 25 18.4 V G96
2020-12-23 07:31:45 C 06 52 38.17 +24 25 16.1 V G96
2020-12-24 09:52:15 C 06 50 06.20 +24 18 10.8 V T05
2020-12-24 09:55:36 C 06 50 05.83 +24 18 09.7 V T05
2020-12-24 10:03:23 C 06 50 05.04 +24 18 07.7 V T05
2020-12-24 10:11:39 C 06 50 04.21 +24 18 05.7 V T05
2020-12-26 04:21:30 C 06 46 06.80 +24 06 27.9 V G96
2020-12-26 04:28:51 C 06 46 06.09 +24 06 26.3 V G96
2020-12-26 04:36:10 C 06 46 05.38 +24 06 24.4 V G96
2020-12-26 04:43:28 C 06 46 04.67 +24 06 22.6 V G96
2021-01-04 07:02:41 C 06 27 58.15 +23 08 35.6 V G96
2021-01-04 07:10:08 C 06 27 57.56 +23 08 33.6 V G96
2021-01-04 07:25:05 C 06 27 56.42 +23 08 29.8 V G96
2021-01-08 06:16:59 C 06 21 41.17 +22 45 23.4 V G96
2021-01-08 06:24:28 C 06 21 40.74 +22 45 21.6 V G96
2021-01-08 06:31:58 C 06 21 40.24 +22 45 20.0 V G96