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
2020-06-21 13:25:27 C 21 16 21.888 -15 53 52.99 U F52
2020-06-23 18:42:47 C 21 22 00.216 -15 03 11.95 V P07
2020-06-23 18:44:31 C 21 22 00.350 -15 03 10.19 V P07
2020-06-23 21:14:08 C 21 22 15.247 -15 00 42.55 V P07
2020-06-23 21:17:16 C 21 22 15.557 -15 00 39.02 V P07
2020-06-23 22:04:51 C 21 22 20.333 -14 59 51.86 V P07
2020-06-28 12:13:30 C 21 34 37.12 -13 02 10.5 V T08
2020-06-28 12:16:50 C 21 34 37.48 -13 02 06.7 V T08
2020-06-28 12:20:54 C 21 34 37.94 -13 02 02.2 V T08
2020-06-28 12:30:51 C 21 34 38.98 -13 01 50.4 V T08
2020-06-29 12:19:54 C 21 37 25.529 -12 33 36.84 U F51
2020-06-29 12:39:33 C 21 37 27.667 -12 33 13.25 U F51
2020-06-29 13:20:59 C 21 37 32.161 -12 32 23.35 U F51
2020-07-12 00:45:12 C 22 17 59.48 -04 47 34.7 V C95
2020-07-12 00:52:47 C 22 18 00.66 -04 47 19.1 V C95
2020-07-12 01:00:23 C 22 18 01.73 -04 47 04.7 V C95
2020-07-12 09:55:55 C 22 19 25.68 -04 29 17.4 V 703
2020-07-12 10:03:44 C 22 19 26.87 -04 29 01.9 V 703
2020-07-12 10:11:32 C 22 19 27.98 -04 28 45.5 V 703
2020-07-12 10:19:20 C 22 19 29.19 -04 28 30.5 V 703
2020-07-12 13:12:38 C 22 19 56.88 -04 22 36.2 V T05
2020-07-12 13:20:37 C 22 19 58.05 -04 22 20.0 V T05
2020-07-12 13:25:16 C 22 19 58.72 -04 22 10.9 V T05
2020-07-12 13:48:47 C 22 20 02.21 -04 21 23.2 V T05
2020-07-14 10:05:38 C 22 27 17.79 -02 49 17.2 V G96
2020-07-14 10:12:28 C 22 27 18.87 -02 49 02.6 V G96
2020-07-14 10:19:18 C 22 27 19.93 -02 48 47.8 V G96
2020-07-14 10:26:09 C 22 27 21.01 -02 48 33.0 V G96
2020-07-14 12:22:32 C 22 27 41.46 -02 44 11.3 V T08
2020-07-14 12:25:11 C 22 27 41.76 -02 44 05.8 V T08
2020-07-14 12:29:11 C 22 27 42.45 -02 43 57.9 V T08
2020-07-14 12:36:35 C 22 27 43.63 -02 43 41.6 V T08
2020-07-18 08:27:33 C 22 44 10.61 +00 50 39.9 V 703
2020-07-18 08:34:07 C 22 44 11.79 +00 50 56.5 V 703
2020-07-18 08:40:42 C 22 44 12.96 +00 51 12.7 V 703
2020-07-18 08:47:17 C 22 44 14.16 +00 51 28.3 V 703
2020-07-18 12:29:14 C 22 44 55.95 +01 00 58.6 V T08
2020-07-18 12:31:54 C 22 44 56.45 +01 01 05.3 V T08
2020-07-18 12:35:53 C 22 44 57.15 +01 01 15.5 V T08
2020-07-18 12:44:34 C 22 44 58.68 +01 01 37.1 V T08
2020-07-18 13:11:49 C 22 45 03.544 +01 02 45.10 U F51
2020-07-18 13:30:00 C 22 45 06.762 +01 03 31.07 U F51
2020-07-18 13:48:17 C 22 45 09.997 +01 04 17.27 U F51
2020-07-18 14:06:38 C 22 45 13.247 +01 05 03.66 U F51
2020-07-19 00:38:19 C 22 47 16.66 +01 31 36.6 V 160
2020-07-19 00:41:42 C 22 47 17.26 +01 31 45.2 V 160
2020-07-19 00:45:08 C 22 47 17.92 +01 31 54.1 V 160
2020-07-20 12:32:23 C 22 54 24.79 +03 06 43.7 V T05
2020-07-20 12:44:20 C 22 54 27.04 +03 07 15.8 V T05
2020-07-20 12:49:00 C 22 54 27.91 +03 07 28.9 V T05