2021 JS4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4380482798 ± 6.30e-06
Semi-major axis (a)2.0519193131 AU ± 4.54e-06
Inclination (i)8.41370869° ± 1.33e-04
Long. of Asc. Node (Ω)307.13010030° ± 1.50e-03
Arg. of Perihelion (ω)22.69528347° ± 4.93e-04
Mean Anomaly (M)120.22961554° ± 2.94e-04
Mean Motion (n)0.3353295741°/day ± 1.11e-06
Perihelion dist (q)1.15307959 AU ± 1.32e-05
Aphelion dist (Q)2.95075904 AU ± 1.45e-05
Orbital Period2.93927634 yr ± 9.75e-06
Physical Parameters
H (abs. magnitude)19.43
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.177″
Uncertainty0
Orbit TypeAmor
MOID0.147352 AU
Observations Used25
Oppositions2
Arc Total2021-2024
First Observation Used2021-04-17
Last Observation Used2024-12-26
Observations (25)
Date Type RA Dec Mag Band Observatory
2021-04-17 09:51:37 C 12 26 07.327 -17 59 18.25 – V F51
2021-04-17 10:25:04 C 12 26 05.496 -17 59 07.66 – V F51
2021-04-17 10:41:47 C 12 26 04.594 -17 59 02.23 – V F51
2021-05-09 08:12:54 C 12 03 53.620 -15 02 53.84 – U F51
2021-05-09 08:31:40 C 12 03 53.054 -15 02 47.52 – U F51
2021-05-09 08:50:30 C 12 03 52.472 -15 02 41.77 – U F51
2021-05-10 05:43:19 C 12 03 17.989 -14 56 02.96 – V 568
2021-05-10 05:44:43 C 12 03 17.946 -14 56 02.22 – V 568
2021-05-10 05:46:23 C 12 03 17.904 -14 56 01.94 – V 568
2021-05-10 05:47:49 C 12 03 17.858 -14 56 01.58 – V 568
2021-05-10 05:49:17 C 12 03 17.809 -14 56 00.87 – V 568
2021-05-10 05:50:45 C 12 03 17.765 -14 56 00.55 – V 568
2021-05-10 05:52:09 C 12 03 17.733 -14 56 00.04 – V 568
2021-05-10 05:53:58 C 12 03 17.679 -14 55 59.43 – V 568
2021-05-11 04:13:17 C 12 02 42.15 -14 49 00.3 – o 291
2021-05-11 04:32:00 C 12 02 41.62 -14 48 53.7 – o 291
2021-05-11 04:50:44 C 12 02 41.14 -14 48 47.4 – o 291
2024-12-25 04:57:09 C 21 20 25.313 -10 44 58.88 – V T09
2024-12-25 05:16:52 C 21 20 28.426 -10 44 40.70 – V T09
2024-12-25 05:18:14 C 21 20 28.613 -10 44 39.55 – V T09
2024-12-25 05:33:05 C 21 20 30.960 -10 44 26.05 – V T09
2024-12-25 05:50:37 C 21 20 33.732 -10 44 10.39 – V T09
2024-12-26 04:48:58 C 21 24 10.328 -10 23 10.23 – V T14
2024-12-26 04:50:42 C 21 24 10.587 -10 23 08.57 – V T14
2024-12-26 04:52:27 C 21 24 10.873 -10 23 07.25 – V T14