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
2020-08-21 13:50:29 C 03 11 31.87 +40 34 04.6 V T08
2020-08-21 13:59:07 C 03 11 35.09 +40 34 16.2 V T08
2020-08-21 14:23:03 C 03 11 44.07 +40 34 46.7 V T08
2020-08-22 22:30:12 S 03 24 19.32 +41 10 39.9 L C51
2020-08-22 22:30:24 S 03 24 19.49 +41 10 40.4 L C51
2020-08-23 01:38:42 S 03 25 32.82 +41 13 53.9 L C51
2020-08-23 03:12:47 S 03 26 09.36 +41 15 27.5 L C51
2020-08-23 04:46:18 S 03 26 45.88 +41 16 57.7 L C51
2020-08-23 06:21:05 S 03 27 22.59 +41 18 33.4 L C51
2020-08-23 07:55:20 S 03 27 59.05 +41 20 08.1 L C51
2020-08-23 09:29:25 S 03 28 35.54 +41 21 37.7 L C51
2020-08-23 12:37:10 S 03 29 48.11 +41 24 35.0 L C51
2020-08-23 15:46:03 S 03 31 00.84 +41 27 33.2 L C51
2020-08-23 18:54:22 S 03 32 13.382 +41 30 27.22 L C51
2020-08-23 18:54:33 S 03 32 13.282 +41 30 27.36 L C51
2020-08-23 22:02:52 S 03 33 25.594 +41 33 17.17 L C51
2020-08-25 13:16:27 C 03 48 18.31 +42 04 05.2 V T08
2020-08-25 13:20:25 C 03 48 19.73 +42 04 08.7 V T08
2020-08-25 13:23:04 C 03 48 20.63 +42 04 10.8 V T08
2020-08-25 13:35:02 C 03 48 24.83 +42 04 20.2 V T08
2020-08-25 13:49:41 C 03 48 29.93 +42 04 30.6 V T08
2020-08-27 13:44:23 C 04 05 47.16 +42 30 20.0 V T05
2020-08-27 13:59:30 C 04 05 52.23 +42 30 27.4 V T05
2020-08-27 14:04:09 C 04 05 53.64 +42 30 30.4 V T05
2020-08-27 14:12:46 C 04 05 56.66 +42 30 34.8 V T05
2020-08-29 14:24:10 C 04 22 25.30 +42 45 49.0 V T08
2020-08-29 14:30:09 C 04 22 27.13 +42 45 50.6 V T08
2020-08-29 14:50:23 C 04 22 33.40 +42 45 56.2 V T08
2020-08-29 14:52:22 C 04 22 34.04 +42 45 56.1 V T08
2020-09-26 11:44:53 C 06 49 25.64 +38 22 47.7 U I41
2020-09-26 11:46:14 C 06 49 25.81 +38 22 46.9 U I41
2020-09-26 12:17:22 C 06 49 29.76 +38 22 29.5 U I41
2020-09-26 12:18:44 C 06 49 29.94 +38 22 28.9 U I41
2020-09-26 12:35:55 C 06 49 32.10 +38 22 18.9 U I41
2020-09-30 10:02:52 C 07 01 39.83 +37 25 33.3 V G96
2020-09-30 10:09:34 C 07 01 40.62 +37 25 29.8 V G96
2020-09-30 10:16:15 C 07 01 41.37 +37 25 26.0 V G96
2020-09-30 10:22:57 C 07 01 42.16 +37 25 22.8 V G96
2020-10-05 09:52:14 C 07 15 20.83 +36 13 36.2 V G96
2020-10-05 09:58:54 C 07 15 21.48 +36 13 32.5 V G96
2020-10-05 10:05:35 C 07 15 22.14 +36 13 29.4 V G96
2020-10-05 10:12:15 C 07 15 22.83 +36 13 25.1 V G96
2020-10-13 10:38:35 C 07 33 28.91 +34 22 10.1 U I41
2020-10-13 10:39:56 C 07 33 29.03 +34 22 09.3 U I41
2020-10-13 11:38:32 C 07 33 33.40 +34 21 39.2 U I41
2020-10-13 11:39:53 C 07 33 33.50 +34 21 38.4 U I41
2020-10-13 12:08:14 C 07 33 35.58 +34 21 23.6 U I41
2020-10-23 14:29:45 C 07 49 57.48 +32 13 09.1 V T08
2020-10-23 14:32:26 C 07 49 57.64 +32 13 07.9 V T08
2020-10-23 14:44:15 C 07 49 58.14 +32 13 02.2 V T08