2021 WY4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.8795209299
Semi-major axis (a)2.5584780483 AU
Inclination (i)12.13721520° ± 4.00e+00
Long. of Asc. Node (Ω)282.05731479° ± 5.00e+00
Arg. of Perihelion (ω)0.55105665° ± 6.00e+00
Mean Anomaly (M)2.15340558°
Mean Motion (n)0.2408418600°/day
Perihelion dist (q)0.30824340 AU
Aphelion dist (Q)4.80870920 AU
Orbital Period4.09234370 yr
Physical Parameters
H (abs. magnitude)20.77
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.304″
Uncertainty
Orbit TypeApollo
MOID0.183714 AU
Observations Used41
Oppositions1
Arc Total
First Observation Used
Last Observation Used2021-12-12
Observations (44)
Date Type RA Dec Mag Band Observatory
2021-11-28 06:38:59 C 22 37 56.236 +22 03 52.98 U F51
2021-11-28 06:58:17 C 22 38 04.202 +22 03 57.94 U F51
2021-11-28 07:17:37 C 22 38 12.181 +22 04 02.86 U F51
2021-11-28 07:36:58 C 22 38 20.154 +22 04 07.76 U F51
2021-11-29 00:42:11 C 22 45 17.60 +22 08 08.3 u H21
2021-11-29 01:02:59 C 22 45 25.67 +22 08 12.2 u H21
2021-11-29 01:09:34 C 22 45 28.22 +22 08 13.9 u H21
2021-11-30 00:24:37 C 22 54 25.03 +22 12 02.2 u H21
2021-11-30 00:33:44 C 22 54 28.41 +22 12 03.5 u H21
2021-11-30 01:55:47 C 22 54 58.94 +22 12 15.8 V I52
2021-11-30 01:58:06 C 22 54 59.77 +22 12 16.3 V I52
2021-11-30 02:01:25 C 22 55 01.06 +22 12 16.0 V I52
2021-11-30 02:01:52 C 22 55 01.12 +22 12 16.3 V I52
2021-11-30 23:53:23 C 23 02 54.26 +22 14 12.1 u H21
2021-12-01 00:06:04 C 23 02 58.66 +22 14 13.2 u H21
2021-12-02 02:12:35 C 23 11 48.65 +22 15 01.3 V I52
2021-12-02 02:15:27 C 23 11 49.55 +22 15 01.2 V I52
2021-12-02 02:18:19 C 23 11 50.48 +22 15 00.8 V I52
2021-12-02 02:20:11 C 23 11 51.08 +22 15 00.7 V I52
2021-12-03 02:02:14 C 23 19 22.05 +22 14 32.7 V I52
2021-12-03 02:07:01 C 23 19 23.49 +22 14 32.6 V I52
2021-12-03 02:11:48 C 23 19 24.95 +22 14 32.6 V I52
2021-12-03 02:14:01 C 23 19 25.58 +22 14 32.3 V I52
2021-12-04 01:26:57 C 23 26 21.61 +22 13 13.5 V I52
2021-12-04 01:30:28 C 23 26 22.37 +22 13 13.9 V I52
2021-12-04 01:34:00 C 23 26 23.62 +22 13 13.0 V I52
2021-12-04 01:37:32 C 23 26 24.58 +22 13 12.1 V I52
2021-12-05 01:29:22 C 23 33 07.40 +22 11 10.5 V I52
2021-12-05 01:34:00 C 23 33 08.63 +22 11 10.1 V I52
2021-12-05 01:38:37 C 23 33 09.91 +22 11 09.8 V I52
2021-12-05 01:43:15 C 23 33 11.13 +22 11 09.1 V I52
2021-12-06 03:19:28 C 23 39 57.36 +22 08 23.2 o 691
2021-12-06 03:34:10 C 23 40 01.06 +22 08 21.2 o 691
2021-12-06 03:48:53 C 23 40 04.78 +22 08 19.6 o 691
2021-12-08 04:12:34 C 23 51 48.65 +22 01 58.2 V V06
2021-12-08 04:18:57 C 23 51 50.13 +22 01 57.3 V V06
2021-12-08 04:25:19 C 23 51 51.54 +22 01 56.3 V V06
2021-12-09 00:00:06 C 23 56 15.70 +21 59 06.6 u H21
2021-12-09 00:11:25 C 23 56 18.14 +21 59 05.1 u H21
2021-12-09 00:24:39 C 23 56 21.00 +21 59 03.2 u H21
2021-12-12 02:29:28 C 00 11 23.44 +21 47 58.6 V V06
2021-12-12 02:34:56 C 00 11 24.44 +21 47 57.4 V V06
2021-12-12 02:40:24 C 00 11 25.45 +21 47 56.5 V V06
2021-12-12 02:45:52 C 00 11 26.48 +21 47 55.6 V V06