2025 YS4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4773148509 ± 1.81e-04
Semi-major axis (a)1.0662275786 AU ± 2.61e-04
Inclination (i)26.87132604° ± 1.31e-02
Long. of Asc. Node (Ω)272.46682308° ± 4.28e-04
Arg. of Perihelion (ω)294.05459874° ± 1.02e-02
Mean Anomaly (M)273.18678073° ± 4.44e-02
Mean Motion (n)0.8952357334°/day ± 3.29e-04
Perihelion dist (q)0.55730132 AU ± 2.36e-04
Aphelion dist (Q)1.57515384 AU ± 4.31e-04
Orbital Period1.10096843 yr ± 4.04e-04
Physical Parameters
H (abs. magnitude)25.47
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-03
RMS Residual0.169″
Uncertainty2
Orbit TypeApollo
MOID0.024201 AU
Observations Used27
Oppositions1
Arc Total2025-2025
First Observation Used2025-12-22
Last Observation Used2025-12-25
Observations (27)
Date Type RA Dec Mag Band Observatory
2025-12-22 09:38:37 C 08 00 41.033 +28 29 19.18 V G96
2025-12-22 09:45:59 C 08 00 38.884 +28 27 29.45 V G96
2025-12-22 09:53:22 C 08 00 36.731 +28 25 38.24 V G96
2025-12-22 10:00:43 C 08 00 34.585 +28 23 47.69 V G96
2025-12-22 11:50:51 C 08 00 02.394 +27 55 35.04 V I52
2025-12-22 11:51:08 C 08 00 02.329 +27 55 30.61 V I52
2025-12-22 11:51:25 C 08 00 02.221 +27 55 26.54 V I52
2025-12-22 11:51:41 C 08 00 02.131 +27 55 21.79 V I52
2025-12-23 04:41:10 C 07 55 20.259 +22 53 46.58 W J04
2025-12-23 04:41:55 C 07 55 19.983 +22 53 31.04 W J04
2025-12-23 04:42:39 C 07 55 19.734 +22 53 15.29 W J04
2025-12-23 05:08:38 C 07 55 27.901 +22 43 34.46 V I52
2025-12-23 05:08:53 C 07 55 27.844 +22 43 29.71 V I52
2025-12-23 05:09:08 C 07 55 27.779 +22 43 24.56 V I52
2025-12-23 05:09:22 C 07 55 27.685 +22 43 19.31 V I52
2025-12-23 07:47:29 C 07 54 30.127 +21 47 15.71 W H01
2025-12-23 07:53:13 C 07 54 27.971 +21 45 10.22 W H01
2025-12-23 08:10:52 C 07 54 21.289 +21 38 41.88 W H01
2025-12-23 08:17:17 C 07 54 18.853 +21 36 20.38 W H01
2025-12-24 06:11:10 C 07 45 56.12 +11 35 08.0 V H21
2025-12-24 06:12:57 C 07 45 55.23 +11 34 08.4 V H21
2025-12-24 06:14:44 C 07 45 54.31 +11 33 08.4 V H21
2025-12-24 06:16:30 C 07 45 53.41 +11 32 08.6 V H21
2025-12-24 23:38:04 B 07 36 51.026 -00 00 30.02 Z K74
2025-12-24 23:48:34 B 07 36 44.136 -00 08 39.84 Z K74
2025-12-25 00:03:08 B 07 36 34.553 -00 20 01.43 Z K74
2025-12-25 00:12:37 B 07 36 28.296 -00 27 26.14 Z K74