2021 WD2

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2542405628 ± 5.64e-06
Semi-major axis (a)1.3518841102 AU ± 1.12e-05
Inclination (i)9.36980044° ± 1.88e-04
Long. of Asc. Node (Ω)252.32670253° ± 1.31e-04
Arg. of Perihelion (ω)229.09121588° ± 4.48e-05
Mean Anomaly (M)153.45614216° ± 1.09e-02
Mean Motion (n)0.6270513121°/day ± 7.79e-06
Perihelion dist (q)1.00818033 AU ± 1.13e-05
Aphelion dist (Q)1.69558789 AU ± 1.60e-05
Orbital Period1.57184311 yr ± 1.95e-05
Physical Parameters
H (abs. magnitude)23.83
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.222″
Uncertainty2
Orbit TypeApollo
MOID0.073637 AU
Observations Used37
Oppositions1
Arc Total2021-2022
First Observation Used2021-10-28
Last Observation Used2022-02-06
Observations (38)
Date Type RA Dec Mag Band Observatory
2021-10-28 07:42:57 C 01 48 22.05 +39 43 00.7 V V00
2021-10-28 07:56:57 C 01 48 21.07 +39 42 52.8 V V00
2021-11-26 05:07:34 C 01 16 27.137 +23 30 51.30 U F51
2021-11-26 05:42:55 C 01 16 26.351 +23 29 36.21 U F51
2021-11-26 06:00:38 C 01 16 25.956 +23 28 58.14 U F51
2021-11-26 09:11:57 C 01 16 21.565 +23 22 02.28 V F51
2021-11-26 09:12:53 C 01 16 21.547 +23 22 00.28 V F51
2021-11-27 23:44:57 C 01 16 07.58 +21 56 47.3 V 033
2021-11-27 23:50:08 C 01 16 07.56 +21 56 35.8 V 033
2021-11-27 23:55:19 C 01 16 07.50 +21 56 23.9 V 033
2021-11-29 02:19:59 C 01 16 08.12 +20 57 22.1 u H21
2021-11-29 02:28:10 C 01 16 08.04 +20 57 04.0 u H21
2021-11-29 02:31:31 C 01 16 07.96 +20 56 56.5 u H21
2021-11-29 03:13:12 C 01 16 08.77 +20 55 27.7 V I52
2021-11-29 03:14:06 C 01 16 08.80 +20 55 25.6 V I52
2021-11-29 03:43:18 C 01 16 08.43 +20 54 20.4 o 691
2021-11-29 04:03:27 C 01 16 08.17 +20 53 34.9 o 691
2021-11-29 04:24:34 C 01 16 07.92 +20 52 47.1 o 691
2021-12-02 02:12:55 C 01 16 38.77 +18 12 07.8 o 291
2021-12-02 02:22:37 C 01 16 38.77 +18 11 45.3 o 291
2021-12-02 02:32:20 C 01 16 38.77 +18 11 22.8 o 291
2021-12-02 07:47:34 C 01 16 39.25 +17 58 59.7 V V06
2021-12-02 07:49:03 C 01 16 39.25 +17 58 56.8 V V06
2021-12-02 07:50:31 C 01 16 39.27 +17 58 52.9 V V06
2021-12-05 03:21:17 C 01 17 58.71 +15 19 23.8 o 691
2021-12-05 03:32:47 C 01 17 58.85 +15 18 56.0 o 691
2021-12-05 03:44:16 C 01 17 58.97 +15 18 28.8 o 691
2021-12-08 04:27:11 C 01 20 10.23 +12 24 01.6 o 691
2021-12-08 04:38:47 C 01 20 10.51 +12 23 33.5 o 691
2021-12-08 04:50:23 C 01 20 10.76 +12 23 06.0 o 691
2021-12-23 00:22:22 C 01 42 18.82 -01 42 33.5 u H21
2021-12-23 00:28:30 C 01 42 19.27 -01 42 47.8 u H21
2021-12-23 00:31:08 C 01 42 19.48 -01 42 53.8 u H21
2022-01-04 03:14:47 C 02 12 16.25 -12 13 29.5 o 291
2022-01-04 03:38:30 C 02 12 18.79 -12 14 16.7 o 291
2022-02-06 01:16:00 C 04 14 24.01 -32 38 48.6 V 807
2022-02-06 01:31:57 C 04 14 26.78 -32 39 04.0 V 807
2022-02-06 01:47:53 C 04 14 29.53 -32 39 19.0 V 807