2021 WL4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2129288321 ± 1.64e-07
Semi-major axis (a)1.3093428603 AU ± 3.95e-09
Inclination (i)18.43868065° ± 3.78e-05
Long. of Asc. Node (Ω)246.51892303° ± 4.95e-06
Arg. of Perihelion (ω)203.66929708° ± 1.29e-04
Mean Anomaly (M)219.08792848° ± 7.99e-05
Mean Motion (n)0.6578580594°/day ± 2.98e-09
Perihelion dist (q)1.03054601 AU ± 2.14e-07
Aphelion dist (Q)1.58813971 AU ± 2.14e-07
Orbital Period1.49823548 yr ± 6.79e-09
Physical Parameters
H (abs. magnitude)24.01
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.368″
Uncertainty0
Orbit TypeAmor
MOID0.057493 AU
Observations Used91
Oppositions3
Arc Total2015-2024
First Observation Used2015-11-30
Last Observation Used2024-12-05
Observations (95)
Date Type RA Dec Mag Band Observatory
2021-12-02 04:42:52 C 01 35 29.37 +08 55 49.1 V U68
2021-12-02 05:12:10 C 01 35 35.59 +08 51 08.7 V U68
2021-12-02 05:16:59 C 01 35 36.65 +08 50 22.1 V U68
2021-12-03 04:00:16 C 01 41 03.45 +05 12 39.7 V I52
2021-12-03 04:00:39 C 01 41 03.54 +05 12 36.5 V I52
2021-12-03 04:01:01 C 01 41 03.60 +05 12 33.1 V I52
2021-12-03 04:01:23 C 01 41 03.69 +05 12 28.9 V I52
2021-12-05 02:10:23 C 01 51 58.83 -01 59 13.1 u 807
2021-12-05 02:14:51 C 01 51 59.74 -01 59 53.5 u 807
2021-12-05 02:19:21 C 01 52 00.70 -02 00 34.8 u 807
2021-12-09 03:52:53 C 02 14 29.63 -15 39 33.6 u 807
2021-12-09 04:01:55 C 02 14 31.45 -15 40 40.0 u 807
2021-12-09 04:11:02 C 02 14 33.34 -15 41 48.7 u 807
2021-12-15 01:54:05 C 02 45 07.68 -30 03 02.8 V 807
2021-12-15 01:59:26 C 02 45 08.66 -30 03 28.3 V 807
2021-12-15 02:04:39 C 02 45 09.60 -30 03 53.1 V 807
2024-11-29 04:57:14 C 02 48 37.296 +20 11 46.03 V V00
2024-11-29 05:06:58 C 02 48 39.168 +20 09 45.68 V V00
2024-11-29 05:12:16 C 02 48 40.093 +20 08 38.72 V 703
2024-11-29 05:15:02 C 02 48 40.712 +20 08 06.07 V V00
2024-11-29 05:15:38 C 02 48 40.612 +20 07 55.70 V 703
2024-11-29 05:18:56 C 02 48 41.296 +20 07 16.39 V 703
2024-11-29 05:22:12 C 02 48 41.922 +20 06 34.56 V 703
2024-11-29 05:23:07 C 02 48 42.260 +20 06 26.24 V V00
2024-11-29 05:52:28 C 02 48 47.761 +20 00 21.35 V I52
2024-11-29 05:52:49 C 02 48 47.822 +20 00 17.06 V I52
2024-11-29 05:53:11 C 02 48 47.876 +20 00 12.67 V I52
2024-11-29 05:53:33 C 02 48 47.963 +20 00 07.92 V I52
2024-12-01 03:56:26 C 02 59 02.730 +10 19 07.50 V 807
2024-12-01 04:00:21 C 02 59 03.470 +10 18 17.60 V 807
2024-12-01 04:04:08 C 02 59 04.200 +10 17 29.10 V 807
2024-12-01 07:13:50 C 02 59 44.779 +09 34 37.92 V 703
2024-12-01 07:20:25 C 02 59 46.046 +09 33 14.26 V 703
2024-12-01 07:23:42 C 02 59 46.601 +09 32 32.32 V 703
2024-12-02 04:58:09 C 03 04 31.530 +04 57 26.78 V 703
2024-12-02 05:01:25 C 03 04 32.218 +04 56 46.25 V 703
2024-12-02 05:04:41 C 03 04 32.747 +04 56 04.74 V 703
2024-12-02 05:07:57 C 03 04 33.287 +04 55 22.66 V 703
2024-12-03 07:26:22 C 03 10 03.022 -00 32 51.90 V 703
2024-12-03 07:29:39 C 03 10 03.580 -00 33 32.94 V 703
2024-12-03 07:32:55 C 03 10 04.148 -00 34 13.80 V 703
2024-12-03 07:36:13 C 03 10 04.739 -00 34 52.72 V 703
2024-12-04 23:48:48 B 03 18 18.228 -08 25 39.94 X L87
2024-12-04 23:58:31 B 03 18 19.889 -08 27 28.33 X L87
2024-12-05 00:08:16 B 03 18 21.614 -08 29 17.16 X L87