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
2019-10-15 09:20:22 C 00 09 12.138 -20 11 00.71 V F52
2019-10-24 07:42:41 C 23 42 19.454 -20 35 36.81 V F52
2019-10-24 07:57:36 C 23 42 17.575 -20 35 36.68 V F52
2019-10-24 08:12:24 C 23 42 15.722 -20 35 36.86 V F52
2019-10-24 08:27:13 C 23 42 13.880 -20 35 37.29 V F52
2021-09-04 13:55:37 C 02 15 22.859 -05 39 25.04 V F51
2021-09-04 14:13:36 C 02 15 22.449 -05 39 30.71 V F51
2021-09-04 14:31:20 C 02 15 22.042 -05 39 36.14 V F51
2021-09-04 14:48:11 C 02 15 21.656 -05 39 40.98 V F51
2021-09-15 11:23:24 C 02 06 08.086 -07 17 20.95 V F52
2021-09-15 11:40:48 C 02 06 07.161 -07 17 28.84 V F52
2021-09-15 11:58:05 C 02 06 06.219 -07 17 36.44 V F52
2021-09-15 12:15:31 C 02 06 05.273 -07 17 44.20 V F52
2021-09-30 11:03:59 C 01 37 05.978 -10 28 29.16 U F52
2021-09-30 11:19:34 C 01 37 04.140 -10 28 38.96 U F52
2021-09-30 11:35:07 C 01 37 02.302 -10 28 48.05 U F52
2021-09-30 11:50:45 C 01 37 00.460 -10 28 57.75 U F52
2021-09-30 13:37:36 C 01 36 47.856 -10 30 02.71 V F51
2021-09-30 13:38:46 C 01 36 47.725 -10 30 03.27 V F51
2021-10-01 09:18:05 C 01 34 29.78 -10 42 07.6 V V06
2021-10-01 09:20:39 C 01 34 29.46 -10 42 08.9 V V06
2021-10-01 09:23:14 C 01 34 29.15 -10 42 10.2 V V06
2021-10-01 09:25:48 C 01 34 28.86 -10 42 12.1 V V06
2021-10-03 10:39:54 C 01 28 20.35 -11 12 43.3 o 691
2021-10-03 10:51:42 C 01 28 18.76 -11 12 50.5 o 691
2021-10-03 11:03:29 C 01 28 17.21 -11 12 58.0 o 691
2021-10-23 07:14:53 C 00 02 07.358 -15 28 04.57 U F52
2021-10-23 07:30:25 C 00 02 03.864 -15 28 09.27 U F52
2021-10-23 08:01:33 C 00 01 56.823 -15 28 18.91 U F52
2021-10-24 03:31:36 C 23 57 36.31 -15 33 55.0 V 291
2021-10-24 03:38:05 C 23 57 34.84 -15 33 56.6 V 291
2021-10-24 03:44:34 C 23 57 33.34 -15 33 58.4 V 291
2021-10-31 05:17:49 C 23 19 01.53 -15 54 48.8 V I52
2021-10-31 05:20:08 C 23 19 00.98 -15 54 48.7 V I52
2021-10-31 05:22:12 C 23 19 00.51 -15 54 48.3 V I52
2021-10-31 05:24:01 C 23 18 59.95 -15 54 48.6 V I52
2021-11-01 03:30:41 C 23 13 59.81 -15 53 44.2 V G96
2021-11-01 03:37:39 C 23 13 58.20 -15 53 43.5 V G96
2021-11-01 03:44:35 C 23 13 56.61 -15 53 43.2 V G96
2021-11-01 03:51:33 C 23 13 55.01 -15 53 43.2 V G96
2021-11-05 03:51:29 C 22 52 33.96 -15 39 06.7 o 691
2021-11-05 04:09:01 C 22 52 30.09 -15 39 02.9 o 691
2021-11-05 04:26:32 C 22 52 26.19 -15 38 58.6 o 691
2021-11-09 02:35:21 C 22 32 28.00 -15 10 15.4 o 691
2021-11-09 02:58:42 C 22 32 23.13 -15 10 06.3 o 691
2021-11-09 03:22:01 C 22 32 18.22 -15 09 57.6 o 691
2021-11-09 04:48:27 C 22 32 00.05 -15 09 25.5 V V06
2021-11-09 04:51:44 C 22 31 59.31 -15 09 23.7 V V06
2021-11-15 01:35:11 C 22 04 27.59 -14 04 37.4 V 807
2021-11-15 01:40:40 C 22 04 26.57 -14 04 34.5 V 807