2021 XN4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2531339040 ± 1.33e-07
Semi-major axis (a)1.3055191387 AU ± 2.06e-09
Inclination (i)23.37101200° ± 1.91e-05
Long. of Asc. Node (Ω)256.72498700° ± 2.63e-06
Arg. of Perihelion (ω)142.65550015° ± 7.54e-05
Mean Anomaly (M)252.87371479° ± 4.11e-05
Mean Motion (n)0.6607503652°/day ± 1.56e-09
Perihelion dist (q)0.97504798 AU ± 1.73e-07
Aphelion dist (Q)1.63599029 AU ± 1.73e-07
Orbital Period1.49167724 yr ± 3.53e-09
Physical Parameters
H (abs. magnitude)23.84
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.303″
Uncertainty0
Orbit TypeApollo
MOID0.029723 AU
Observations Used59
Oppositions1
Arc Total2021-2024
First Observation Used2021-12-08
Last Observation Used2024-12-08
Observations (63)
Date Type RA Dec Mag Band Observatory
2024-12-04 10:27:31 C 09 04 52.734 +40 19 42.89 V I52
2024-12-04 10:27:50 C 09 04 52.381 +40 19 36.59 V I52
2024-12-04 10:28:09 C 09 04 52.054 +40 19 30.54 V I52
2024-12-06 23:36:49 B 08 12 51.475 +18 34 20.42 Z J57
2024-12-06 23:43:40 B 08 12 46.543 +18 31 54.70 Z J57
2024-12-06 23:50:22 B 08 12 41.710 +18 29 31.16 Z J57
2024-12-07 00:08:47 B 08 12 26.49 +18 22 47.3 V 204
2024-12-07 00:16:25 B 08 12 20.95 +18 20 04.3 V 204
2024-12-07 00:24:04 B 08 12 15.39 +18 17 21.1 V 204
2024-12-08 08:50:23 C 07 51 57.492 +07 16 54.12 V 703
2024-12-08 08:53:45 C 07 51 55.458 +07 15 50.33 V 703
2024-12-08 08:57:06 C 07 51 53.464 +07 14 45.24 V 703
2024-12-08 09:00:28 C 07 51 51.350 +07 13 42.10 V 703