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
2015-11-30 06:53:40 C 23 33 04.939 +13 50 57.50 V F51
2015-11-30 07:10:07 C 23 33 07.905 +13 49 48.62 V F51
2015-12-14 05:14:39 C 00 42 14.386 -09 14 03.77 V F51
2015-12-14 05:31:57 C 00 42 17.844 -09 15 08.64 V F51
2015-12-14 05:49:18 C 00 42 21.290 -09 16 13.60 V F51
2015-12-14 06:06:39 C 00 42 24.731 -09 17 18.44 V F51
2021-11-29 01:19:43 C 01 17 28.33 +20 45 24.0 V G96
2021-11-29 01:29:30 C 01 17 30.44 +20 43 56.6 V G96
2021-11-29 01:37:39 C 01 17 32.17 +20 42 42.6 V G96
2021-11-29 01:45:47 C 01 17 33.99 +20 41 30.1 V G96
2021-11-29 02:17:12 C 01 17 40.25 +20 36 44.3 X 858
2021-11-29 02:25:08 C 01 17 41.97 +20 35 32.6 X 858
2021-11-29 02:32:55 C 01 17 43.65 +20 34 22.3 X 858
2021-11-29 04:09:28 C 01 18 04.75 +20 19 51.7 V I52
2021-11-29 04:09:49 C 01 18 04.81 +20 19 48.4 V I52
2021-11-29 04:10:10 C 01 18 04.89 +20 19 45.3 V I52
2021-11-29 04:10:32 C 01 18 04.96 +20 19 42.0 V I52
2021-11-29 18:57:44 C 01 21 39.78 +18 03 33.1 V 511
2021-11-29 19:04:34 C 01 21 41.28 +18 02 29.4 V 511
2021-11-29 19:10:51 C 01 21 42.69 +18 01 30.4 V 511
2021-11-29 20:34:26 C 01 22 00.14 +17 48 32.4 V L01
2021-11-29 20:36:40 C 01 22 00.61 +17 48 11.3 V L01
2021-11-29 20:38:55 C 01 22 01.12 +17 47 50.4 V L01
2021-11-29 20:41:10 C 01 22 01.57 +17 47 29.5 V L01
2021-11-29 20:43:24 C 01 22 02.09 +17 47 08.6 V L01
2021-11-29 21:37:51 C 01 22 14.43 +17 38 40.9 V 204
2021-11-29 21:45:55 C 01 22 16.95 +17 37 28.4 V I93
2021-11-29 21:50:19 C 01 22 17.94 +17 36 47.6 V I93
2021-11-29 21:54:35 C 01 22 18.83 +17 36 08.1 V I93
2021-11-29 22:02:08 C 01 22 19.76 +17 34 53.5 V 204
2021-11-30 01:44:36 C 01 23 17.75 +17 00 32.3 V 734
2021-11-30 01:56:51 C 01 23 21.96 +16 58 46.4 V G96
2021-11-30 02:01:46 C 01 23 20.61 +16 57 52.6 u H21
2021-11-30 02:03:21 C 01 23 21.79 +16 57 37.2 V 734
2021-11-30 02:04:56 C 01 23 23.72 +16 57 31.7 V G96
2021-11-30 02:09:49 C 01 23 22.34 +16 56 37.6 u H21
2021-11-30 02:12:59 C 01 23 25.45 +16 56 16.7 V G96
2021-11-30 02:17:53 C 01 23 24.09 +16 55 22.5 u H21
2021-11-30 02:20:49 C 01 23 25.58 +16 54 54.4 V 734
2021-11-30 02:21:02 C 01 23 27.20 +16 55 02.0 V G96
2021-11-30 17:41:04 C 01 27 08.35 +14 30 17.8 V 587
2021-11-30 17:42:06 C 01 27 08.59 +14 30 08.1 V 587
2021-11-30 17:42:37 C 01 27 08.66 +14 30 02.8 V 587
2021-11-30 19:48:48 C 01 27 36.73 +14 10 13.6 Z K19
2021-11-30 19:55:30 C 01 27 38.17 +14 09 10.5 Z K19
2021-11-30 20:02:10 C 01 27 39.64 +14 08 07.0 Z K19
2021-12-02 03:07:31 C 01 35 03.88 +09 13 01.2 u 807
2021-12-02 03:11:12 C 01 35 04.66 +09 12 26.4 u 807
2021-12-02 03:14:51 C 01 35 05.43 +09 11 51.0 u 807
2021-12-02 04:38:04 C 01 35 28.32 +08 56 35.6 V U68