IAA RAS IAA Minor Planet Database

2021 WS4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.0989283409 ± 4.12e-06
Semi-major axis (a)1.0979933185 AU ± 4.75e-06
Inclination (i)2.76184903° ± 1.24e-04
Long. of Asc. Node (Ω)67.24011670° ± 1.29e-04
Arg. of Perihelion (ω)349.51897256° ± 7.39e-04
Mean Anomaly (M)172.74904218° ± 7.66e-03
Mean Motion (n)0.8566683660°/day ± 5.55e-06
Perihelion dist (q)0.98937066 AU ± 6.23e-06
Aphelion dist (Q)1.20661598 AU ± 6.91e-06
Orbital Period1.15053424 yr ± 7.46e-06
Physical Parameters
H (abs. magnitude)30.66
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.299″
Uncertainty1
Orbit TypeApollo
MOID0.003133 AU
Observations Used43
Oppositions1
Arc Total2021-2021
First Observation Used2021-11-30
Last Observation Used2021-12-08
Observations (48)
Date Type RA Dec Mag Band Observatory
2021-11-30 05:49:53 C 03 36 02.29 +14 23 48.0 – V G96
2021-11-30 05:57:55 C 03 36 09.87 +14 30 15.0 – V G96
2021-11-30 06:05:57 C 03 36 17.44 +14 36 40.5 – V G96
2021-11-30 06:13:57 C 03 36 25.03 +14 43 05.6 – V G96
2021-11-30 07:26:01 C 03 37 33.20 +15 39 44.1 – V I52
2021-11-30 07:26:35 C 03 37 33.74 +15 40 10.2 – V I52
2021-11-30 07:27:09 C 03 37 34.28 +15 40 36.2 – V I52
2021-11-30 07:27:42 C 03 37 34.82 +15 41 02.0 – V I52
2021-11-30 08:50:49 C 03 38 16.42 +16 38 34.9 – Z W33
2021-11-30 08:57:52 C 03 38 25.67 +16 43 43.8 – Z W33
2021-11-30 09:04:58 C 03 38 35.04 +16 48 53.5 – Z W33
2021-11-30 09:07:50 C 03 39 16.23 +16 56 42.8 – V I52
2021-11-30 09:08:47 C 03 39 17.24 +16 57 24.4 – V I52
2021-11-30 09:09:43 C 03 39 18.27 +16 58 06.0 – V I52
2021-11-30 09:25:40 C 03 39 35.78 +17 09 49.3 – V G96
2021-11-30 09:26:01 C 03 39 36.17 +17 10 04.7 – V G96
2021-11-30 09:26:21 C 03 39 36.54 +17 10 19.5 – V G96
2021-11-30 09:32:53 C 03 39 43.87 +17 15 06.4 – V G96
2021-11-30 09:33:07 C 03 39 44.11 +17 15 16.9 – V G96
2021-11-30 09:33:35 C 03 39 44.68 +17 15 36.6 – V G96
2021-11-30 19:31:21 C 03 58 05.30 +24 12 59.2 – V 587
2021-11-30 19:31:53 C 03 58 05.90 +24 13 21.4 – V 587
2021-11-30 19:32:25 C 03 58 06.51 +24 13 43.2 – V 587
2021-11-30 20:17:16 C 03 59 13.67 +24 46 12.2 – V B49
2021-11-30 20:18:32 C 03 59 15.12 +24 47 06.1 – V B49
2021-11-30 20:19:54 C 03 59 16.57 +24 48 01.0 – V B49
2021-11-30 20:26:03 C 03 59 06.70 +24 50 45.5 – V 203
2021-11-30 20:35:58 C 03 59 17.25 +24 57 28.3 – V 203
2021-11-30 20:54:26 C 03 59 27.80 +25 10 26.9 – V L01
2021-11-30 20:55:41 C 03 59 29.12 +25 11 16.4 – V L01
2021-11-30 20:58:09 C 03 59 31.57 +25 12 55.4 – V L01
2021-11-30 20:58:35 C 03 59 40.74 +25 12 40.4 – V 203
2021-11-30 20:59:23 C 03 59 32.84 +25 13 44.8 – V L01
2021-11-30 21:00:41 C 03 59 34.18 +25 14 36.5 – V L01
2021-11-30 21:03:14 C 03 59 36.69 +25 16 18.0 – V L01
2021-11-30 21:04:03 C 03 59 37.54 +25 16 50.3 – V L01
2021-11-30 21:20:48 C 04 00 23.92 +25 27 39.5 – X 958
2021-11-30 21:24:52 C 04 00 28.06 +25 30 22.7 – X 958
2021-11-30 21:28:53 C 04 00 32.20 +25 33 02.7 – X 958
2021-12-02 00:43:07 C 04 36 55.32 +39 24 37.8 – V 033
2021-12-02 00:43:46 C 04 36 55.93 +39 24 52.5 – V 033
2021-12-02 00:44:27 C 04 36 56.54 +39 25 07.6 – V 033
2021-12-02 05:24:31 C 04 44 46.41 +41 19 33.9 – V I52
2021-12-02 05:24:50 C 04 44 46.64 +41 19 41.2 – V I52
2021-12-02 05:26:26 C 04 44 47.89 +41 20 19.4 – V I52
2021-12-02 05:26:44 C 04 44 48.12 +41 20 26.3 – V I52
2021-12-08 12:46:09 C 06 50 44.17 +60 46 39.7 – o 291
2021-12-08 12:52:37 C 06 50 46.11 +60 46 40.7 – o 291