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
2021-11-15 01:46:08 C 22 04 25.53 -14 04 31.7 V 807
2021-12-01 02:15:20 C 21 01 08.36 -10 04 06.1 o 291
2021-12-01 02:25:54 C 21 01 06.68 -10 03 59.8 o 291
2021-12-01 02:36:30 C 21 01 05.17 -10 03 51.3 o 291
2023-09-10 13:11:54 C 03 16 39.855 +04 38 04.64 V F51
2023-09-13 13:50:24 C 03 18 59.973 +04 50 43.22 V T12
2023-09-13 13:53:51 C 03 19 00.074 +04 50 43.87 V T12
2023-09-13 13:58:09 C 03 19 00.196 +04 50 44.66 V T12
2023-09-15 13:33:57 C 03 20 27.474 +04 59 32.85 V T12
2023-09-15 13:58:28 C 03 20 28.126 +04 59 37.51 V T12
2023-09-19 09:16:09 C 03 23 04.103 +05 18 07.81 V G96
2023-09-19 09:23:39 C 03 23 04.312 +05 18 09.32 V G96
2023-09-19 09:31:07 C 03 23 04.470 +05 18 10.12 V G96
2023-09-19 09:38:37 C 03 23 04.686 +05 18 12.82 V G96
2023-09-19 10:28:41 C 03 23 05.85 +05 18 24.1 o 291
2023-09-19 10:43:35 C 03 23 06.20 +05 18 27.3 o 291
2023-09-19 10:58:30 C 03 23 06.53 +05 18 30.8 o 291
2023-10-08 10:43:48 C 03 30 28.556 +08 32 07.13 X F52
2023-10-08 10:59:29 C 03 30 28.445 +08 32 20.92 X F52
2023-10-08 11:15:10 C 03 30 28.334 +08 32 34.80 X F52
2023-10-08 11:30:58 C 03 30 28.223 +08 32 48.63 X F52
2023-10-10 08:44:27 C 03 30 18.076 +09 16 56.89 V 703
2023-10-10 08:51:47 C 03 30 18.007 +09 17 04.74 V 703
2023-10-10 08:59:14 C 03 30 17.942 +09 17 13.09 V 703
2023-10-10 09:06:46 C 03 30 17.791 +09 17 21.01 V 703
2023-10-11 06:13:35 C 03 30 06.691 +09 42 24.23 V W68
2023-10-11 06:16:14 C 03 30 06.674 +09 42 26.93 V W68
2023-10-11 06:20:47 C 03 30 06.629 +09 42 34.24 V W68
2023-10-11 06:57:48 C 03 30 05.866 +09 43 18.48 V W68
2023-10-12 00:09:13 B 03 29 53.72 +10 04 54.1 X K19
2023-10-12 00:14:32 B 03 29 53.62 +10 05 01.5 X K19
2023-10-12 00:19:55 B 03 29 53.50 +10 05 09.1 X K19
2023-10-12 08:36:07 C 03 29 45.863 +10 16 47.17 V G96
2023-10-12 08:43:30 C 03 29 45.679 +10 16 57.79 V G96
2023-10-12 08:50:54 C 03 29 45.503 +10 17 08.34 V G96
2023-10-12 08:58:19 C 03 29 45.312 +10 17 18.96 V G96
2023-10-14 03:09:42 B 03 28 49.52 +11 26 13.8 X M45
2023-10-14 03:17:02 B 03 28 49.27 +11 26 27.5 X M45
2023-10-14 03:24:05 B 03 28 49.04 +11 26 40.6 X M45
2023-10-14 08:15:36 C 03 28 42.906 +11 36 05.80 V 703
2023-10-14 08:22:40 C 03 28 42.618 +11 36 19.91 V 703
2023-10-14 08:29:45 C 03 28 42.323 +11 36 33.70 V 703
2023-10-14 08:36:49 C 03 28 42.118 +11 36 47.12 V 703
2023-10-15 09:36:41 C 03 27 50.940 +12 29 53.38 V 703
2023-10-15 09:44:25 C 03 27 50.558 +12 30 11.56 V 703
2023-10-15 09:52:08 C 03 27 50.159 +12 30 29.23 V 703
2023-10-15 09:59:51 C 03 27 49.806 +12 30 47.34 V 703
2023-10-16 08:10:53 C 03 26 52.616 +13 27 08.21 V 703
2023-10-16 08:18:22 C 03 26 52.138 +13 27 28.84 V 703
2023-10-16 08:25:52 C 03 26 51.695 +13 27 49.61 V 703