2021 XW4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3020395094 ± 1.36e-04
Semi-major axis (a)1.4140855780 AU ± 2.82e-04
Inclination (i)6.58407589° ± 2.41e-03
Long. of Asc. Node (Ω)264.70852418° ± 1.20e-03
Arg. of Perihelion (ω)120.28391957° ± 1.40e-03
Mean Anomaly (M)152.21492141° ± 2.62e-01
Mean Motion (n)0.5861364595°/day ± 1.76e-04
Perihelion dist (q)0.98697586 AU ± 2.75e-04
Aphelion dist (Q)1.84119529 AU ± 4.15e-04
Orbital Period1.68156454 yr ± 5.03e-04
Physical Parameters
H (abs. magnitude)24.51
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.436″
Uncertainty3
Orbit TypeApollo
MOID0.063333 AU
Observations Used31
Oppositions1
Arc Total2021-2022
First Observation Used2021-12-08
Last Observation Used2022-01-03
Observations (31)
Date Type RA Dec Mag Band Observatory
2021-12-08 04:43:27 C 02 31 04.16 +29 44 35.3 V G96
2021-12-08 04:51:36 C 02 31 07.04 +29 44 15.3 V G96
2021-12-08 05:07:50 C 02 31 12.76 +29 43 34.1 V G96
2021-12-08 06:51:16 C 02 31 49.25 +29 39 10.1 V I52
2021-12-08 06:53:41 C 02 31 50.12 +29 39 04.2 V I52
2021-12-08 06:56:06 C 02 31 50.93 +29 38 57.0 V I52
2021-12-08 06:58:31 C 02 31 51.85 +29 38 51.8 V I52
2021-12-09 01:47:37 C 02 38 50.97 +28 52 06.1 V I52
2021-12-09 01:48:34 C 02 38 51.20 +28 52 03.9 V I52
2021-12-09 01:49:30 C 02 38 51.54 +28 52 00.8 V I52
2021-12-09 01:50:26 C 02 38 51.85 +28 51 59.1 V I52
2021-12-09 01:52:46 C 02 38 50.58 +28 51 51.1 u H21
2021-12-09 02:00:49 C 02 38 53.28 +28 51 31.9 u H21
2021-12-09 02:08:44 C 02 38 55.97 +28 51 12.7 u H21
2021-12-10 01:23:16 C 02 46 55.87 +27 54 51.6 u H21
2021-12-10 01:27:23 C 02 46 57.14 +27 54 42.5 u H21
2021-12-10 01:31:36 C 02 46 58.47 +27 54 32.6 u H21
2021-12-12 01:47:00 C 03 01 59.35 +26 03 27.7 V 291
2021-12-12 01:57:58 C 03 02 02.37 +26 03 04.5 V 291
2021-12-12 02:09:02 C 03 02 05.41 +26 02 41.0 V 291
2021-12-12 02:19:58 C 03 02 08.27 +26 02 16.4 V I52
2021-12-12 02:26:24 C 03 02 10.09 +26 02 03.8 V I52
2021-12-12 02:34:16 C 03 02 12.20 +26 01 46.7 V I52
2021-12-12 02:37:14 C 03 02 13.14 +26 01 40.4 V I52
2021-12-13 04:06:12 C 03 09 18.97 +25 06 39.1 V I52
2021-12-13 04:09:19 C 03 09 19.81 +25 06 32.2 V I52
2021-12-13 04:12:25 C 03 09 20.52 +25 06 26.5 V I52
2021-12-13 04:14:41 C 03 09 21.09 +25 06 21.5 V I52
2022-01-03 07:34:02 C 04 30 54.39 +14 41 05.5 o 291
2022-01-03 07:55:33 C 04 30 56.37 +14 40 52.7 o 291
2022-01-03 08:17:07 C 04 30 58.35 +14 40 39.1 o 291