2021 SZ4

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.8073696480 ± 8.12e-08
Semi-major axis (a)1.5428054578 AU ± 2.57e-08
Inclination (i)26.40208249° ± 1.25e-05
Long. of Asc. Node (Ω)28.37777054° ± 1.42e-06
Arg. of Perihelion (ω)129.58711691° ± 1.29e-05
Mean Anomaly (M)6.55295093° ± 1.05e-05
Mean Motion (n)0.5143343459°/day ± 1.29e-08
Perihelion dist (q)0.29719116 AU ± 1.25e-07
Aphelion dist (Q)2.78841976 AU ± 1.34e-07
Orbital Period1.91631434 yr ± 4.79e-08
Physical Parameters
H (abs. magnitude)20.47
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.257″
Uncertainty0
Orbit TypeApollo
MOID0.035124 AU
Observations Used214
Oppositions2
Arc Total2019-2023
First Observation Used2019-10-15
Last Observation Used2023-10-25
Observations (222)
Date Type RA Dec Mag Band Observatory
2023-10-16 08:33:23 C 03 26 51.241 +13 28 10.38 V 703
2023-10-17 10:44:08 C 03 25 21.331 +14 49 41.14 X F51
2023-10-17 11:02:42 C 03 25 19.815 +14 50 46.11 X F51
2023-10-17 11:21:30 C 03 25 18.267 +14 51 51.98 X F51
2023-10-18 02:54:14 C 03 24 07.450 +15 49 46.49 X G19
2023-10-18 03:02:45 C 03 24 06.703 +15 50 21.01 X G19
2023-10-18 03:11:17 C 03 24 05.916 +15 50 55.03 X G19
2023-10-18 05:05:21 C 03 23 59.316 +16 00 00.60 V W85
2023-10-18 05:06:37 C 03 23 59.199 +16 00 05.87 V W85
2023-10-18 05:07:53 C 03 23 59.078 +16 00 11.41 V W85
2023-10-18 05:09:08 C 03 23 58.961 +16 00 16.25 V W85
2023-10-18 05:10:24 C 03 23 58.827 +16 00 21.63 V W85
2023-10-18 05:11:40 C 03 23 58.703 +16 00 27.06 V W85
2023-10-18 05:12:54 C 03 23 58.585 +16 00 32.10 V W85
2023-10-18 05:14:10 C 03 23 58.452 +16 00 37.46 V W85
2023-10-18 09:56:17 C 03 23 32.456 +16 19 29.57 V 703
2023-10-18 10:03:12 C 03 23 31.754 +16 19 59.77 V 703
2023-10-18 10:10:07 C 03 23 31.024 +16 20 29.29 V 703
2023-10-18 10:17:02 C 03 23 30.311 +16 20 59.71 V 703
2023-10-18 10:40:37 C 03 23 30.864 +16 22 54.19 V T05
2023-10-18 10:45:03 C 03 23 30.401 +16 23 13.74 V T05
2023-10-18 10:50:55 C 03 23 29.794 +16 23 39.41 V T05
2023-10-18 11:40:24 C 03 23 24.497 +16 27 17.17 V T05
2023-10-18 21:08:28 C 03 22 32.21 +17 10 30.3 M32
2023-10-18 21:11:47 C 03 22 31.85 +17 10 46.4 M32
2023-10-18 21:15:07 C 03 22 31.49 +17 11 02.7 M32
2023-10-18 21:18:25 C 03 22 31.12 +17 11 19.0 M32
2023-10-19 01:09:07 B 03 22 04.406 +17 31 44.69 Z M49
2023-10-19 01:12:00 B 03 22 04.037 +17 31 59.20 Z M49
2023-10-19 01:14:56 B 03 22 03.689 +17 32 13.92 Z M49
2023-10-19 09:36:16 C 03 21 08.359 +18 15 22.39 V U52
2023-10-19 09:36:50 C 03 21 08.266 +18 15 25.56 V U52
2023-10-19 09:37:26 C 03 21 08.215 +18 15 28.91 V U52
2023-10-20 10:32:51 C 03 17 33.972 +20 56 15.14 V V00
2023-10-20 10:42:10 C 03 17 32.208 +20 57 24.37 V V00
2023-10-20 10:51:31 C 03 17 30.444 +20 58 33.78 V V00
2023-10-20 10:59:26 C 03 17 28.946 +20 59 32.82 V V00
2023-10-20 20:47:35 C 03 15 47.06 +22 17 29.3 V C23
2023-10-20 20:51:54 C 03 15 46.18 +22 18 05.9 V C23
2023-10-20 20:56:12 C 03 15 45.28 +22 18 43.0 V C23
2023-10-21 08:28:03 C 03 13 10.337 +24 06 15.37 V 703
2023-10-21 08:35:51 C 03 13 08.267 +24 07 33.67 V 703
2023-10-21 08:43:40 C 03 13 06.154 +24 08 52.48 V 703
2023-10-21 08:51:29 C 03 13 04.048 +24 10 11.39 V 703
2023-10-21 18:27:35 C 03 10 30.292 +25 54 14.37 V O85
2023-10-21 18:30:55 C 03 10 29.233 +25 54 53.46 V O85
2023-10-21 18:37:34 C 03 10 27.118 +25 56 10.80 V O85
2023-10-21 18:40:54 C 03 10 26.049 +25 56 49.48 V O85
2023-10-21 18:44:14 C 03 10 24.976 +25 57 28.33 V O85
2023-10-21 18:47:33 C 03 10 23.923 +25 58 06.88 V O85