2021 WR4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2513586000
Semi-major axis (a)1.2805211000 AU
Inclination (i)0.40432000°
Long. of Asc. Node (Ω)61.60420000°
Arg. of Perihelion (ω)39.18950000°
Mean Anomaly (M)248.04925000°
Mean Motion (n)0.6801801800°/day
Perihelion dist (q)0.95865110 AU
Aphelion dist (Q)1.60239110 AU
Orbital Period1.44903910 yr
Physical Parameters
H (abs. magnitude)30.43
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.880″
Uncertainty5
Orbit TypeApollo
MOID0.001014 AU
Observations Used26
Oppositions1
Arc Total
First Observation Used
Last Observation Used2021-12-02
Observations (27)
Date Type RA Dec Mag Band Observatory
2021-11-29 04:11:30 C 03 03 02.13 +21 06 37.4 V G96
2021-11-29 04:21:46 C 03 03 13.48 +21 09 06.0 V G96
2021-11-29 04:31:23 C 03 03 24.12 +21 11 25.2 V G96
2021-11-29 06:21:51 C 03 05 27.64 +21 37 48.9 V I52
2021-11-29 06:22:17 C 03 05 28.14 +21 37 55.1 V I52
2021-11-29 06:22:44 C 03 05 28.65 +21 38 01.4 V I52
2021-11-29 06:23:10 C 03 05 29.13 +21 38 07.5 V I52
2021-11-30 04:48:00 C 03 58 56.60 +29 01 15.7 V I52
2021-11-30 04:48:43 C 03 58 58.83 +29 01 35.6 V I52
2021-11-30 04:49:26 C 03 59 01.07 +29 01 55.2 V I52
2021-11-30 04:50:08 C 03 59 03.32 +29 02 15.0 V I52
2021-11-30 20:22:18 C 05 22 20.63 +36 24 05.0 V 587
2021-11-30 20:22:36 C 05 22 22.86 +36 24 14.7 V 587
2021-11-30 20:35:13 C 05 23 54.50 +36 31 02.3 V 587
2021-11-30 21:18:41 C 05 29 06.93 +36 55 19.5 V L01
2021-11-30 21:19:55 C 05 29 16.11 +36 55 57.8 V L01
2021-11-30 21:21:10 C 05 29 25.34 +36 56 36.4 V L01
2021-11-30 21:22:24 C 05 29 34.51 +36 57 14.8 V L01
2021-11-30 21:23:39 C 05 29 43.78 +36 57 53.3 V L01
2021-11-30 21:24:19 C 05 30 19.12 +36 58 01.7 V B49
2021-11-30 21:25:43 C 05 30 29.72 +36 58 46.2 V B49
2021-12-02 02:11:04 C 10 15 01.06 +30 26 58.8 V 033
2021-12-02 02:11:24 C 10 15 03.33 +30 26 43.5 V 033
2021-12-02 02:11:44 C 10 15 05.68 +30 26 27.5 V 033
2021-12-02 03:05:00 C 10 21 28.65 +29 42 27.4 V J95
2021-12-02 03:13:40 C 10 22 25.78 +29 35 41.6 V J95
2021-12-02 03:35:57 C 10 24 50.46 +29 18 13.9 V J95