2021 WP4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4870108384 ± 3.46e-03
Semi-major axis (a)2.3061135551 AU ± 1.77e-02
Inclination (i)6.25836201° ± 7.59e-03
Long. of Asc. Node (Ω)359.70893680° ± 6.88e-02
Arg. of Perihelion (ω)0.26437882° ± 1.07e-01
Mean Anomaly (M)59.73567273° ± 4.86e+00
Mean Motion (n)0.2814435132°/day ± 3.25e-03
Perihelion dist (q)1.18301126 AU ± 1.21e-02
Aphelion dist (Q)3.42921585 AU ± 2.75e-02
Orbital Period3.50203944 yr ± 4.04e-02
Physical Parameters
H (abs. magnitude)20.19
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.301″
Uncertainty4
Orbit TypeAmor
MOID0.177431 AU
Observations Used42
Oppositions1
Arc Total2021-2021
First Observation Used2021-11-28
Last Observation Used2021-12-13
Observations (43)
Date Type RA Dec Mag Band Observatory
2021-11-28 05:12:39 C 22 42 32.002 -01 12 01.97 U F51
2021-11-28 05:30:50 C 22 42 34.741 -01 11 39.44 U F51
2021-11-28 05:48:52 C 22 42 37.477 -01 11 17.08 U F51
2021-11-28 06:06:52 C 22 42 40.185 -01 10 54.94 U F51
2021-11-28 08:40:37 C 22 43 03.488 -01 07 45.28 V F51
2021-11-28 08:41:47 C 22 43 03.672 -01 07 43.90 V F51
2021-11-29 00:52:04 C 22 45 33.42 -00 47 39.7 V 807
2021-11-29 01:00:02 C 22 45 34.63 -00 47 30.1 V 807
2021-11-29 01:08:01 C 22 45 35.82 -00 47 20.1 V 807
2021-11-29 01:28:17 C 22 45 39.38 -00 47 08.0 V I52
2021-11-29 01:28:34 C 22 45 39.47 -00 47 07.4 o 691
2021-11-29 01:31:47 C 22 45 39.92 -00 47 04.7 V I52
2021-11-29 01:33:18 C 22 45 40.15 -00 47 02.7 V I52
2021-11-29 01:34:49 C 22 45 40.37 -00 47 00.9 V I52
2021-11-29 01:41:47 C 22 45 41.433 -00 46 51.26 V 679
2021-11-29 01:48:04 C 22 45 42.39 -00 46 43.3 o 691
2021-11-29 02:07:35 C 22 45 45.32 -00 46 19.7 o 691
2021-11-30 00:30:11 C 22 49 11.46 -00 18 58.5 u H21
2021-11-30 00:41:38 C 22 49 13.17 -00 18 44.5 u H21
2021-11-30 00:46:56 C 22 49 13.99 -00 18 38.2 u H21
2021-11-30 23:52:14 C 22 52 46.24 +00 09 27.2 u H21
2021-12-01 00:02:45 C 22 52 47.83 +00 09 40.3 u H21
2021-12-02 02:51:46 C 22 56 53.07 +00 42 04.7 V V06
2021-12-02 02:54:35 C 22 56 53.48 +00 42 07.8 V V06
2021-12-02 02:57:25 C 22 56 53.89 +00 42 10.9 V V06
2021-12-02 03:00:15 C 22 56 54.30 +00 42 14.3 V V06
2021-12-06 02:04:42 C 23 11 17.25 +02 34 56.1 o 691
2021-12-06 02:13:02 C 23 11 18.48 +02 35 05.2 V I52
2021-12-06 02:19:39 C 23 11 19.47 +02 35 12.4 V I52
2021-12-06 02:26:06 C 23 11 20.42 +02 35 20.7 o 691
2021-12-06 02:26:17 C 23 11 20.45 +02 35 20.5 V I52
2021-12-06 02:32:54 C 23 11 20.99 +02 35 25.3 V I52
2021-12-06 02:47:29 C 23 11 23.57 +02 35 45.9 o 691
2021-12-08 02:51:01 C 23 18 35.00 +03 31 18.6 V V06
2021-12-08 02:56:25 C 23 18 35.79 +03 31 24.6 V V06
2021-12-08 03:01:48 C 23 18 36.58 +03 31 31.2 V V06
2021-12-08 03:07:11 C 23 18 37.37 +03 31 37.2 V V06
2021-12-09 01:35:17 C 23 21 58.23 +03 57 14.5 V V06
2021-12-09 01:38:04 C 23 21 58.63 +03 57 17.5 V V06
2021-12-09 01:40:51 C 23 21 59.00 +03 57 20.6 V V06
2021-12-13 03:18:46 C 23 36 21.85 +05 45 58.2 V V06
2021-12-13 03:24:24 C 23 36 22.63 +05 46 04.4 V V06
2021-12-13 03:30:02 C 23 36 23.44 +05 46 10.3 V V06