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
2023-10-25 10:45:08 C 00 59 28.41 +65 18 16.4 r Q10
2023-10-25 10:45:51 C 00 58 48.946 +65 20 03.73 V T05
2023-10-25 10:50:07 C 00 58 54.33 +65 21 56.4 r Q10
2023-10-25 10:55:05 C 00 58 19.93 +65 25 36.6 r Q10
2023-10-25 17:34:04 C 00 00 51.96 +69 51 37.5 X G02
2023-10-25 17:35:57 C 00 00 31.69 +69 52 43.7 X G02
2023-10-25 17:37:42 C 00 00 12.61 +69 53 46.4 X G02
2023-10-25 19:53:47 C 23 33 36.32 +71 07 41.4 q L04
2023-10-25 19:55:37 C 23 33 13.04 +71 08 35.5 q L04
2023-10-25 19:57:22 C 23 32 51.11 +71 09 26.3 q L04
2023-10-25 20:00:16 C 23 32 14.39 +71 10 50.5 q L04
2023-10-25 20:02:15 C 23 31 49.56 +71 11 47.2 q L04
2023-10-25 20:04:11 C 23 31 25.02 +71 12 43.2 q L04
2023-10-25 20:12:12 C 23 29 56.549 +71 16 08.44 V Z80
2023-10-25 20:20:23 C 23 28 11.837 +71 20 01.07 V Z80
2023-10-25 20:28:38 C 23 26 25.586 +71 23 51.04 V Z80
2023-10-25 20:35:23 C 23 25 11.906 +71 28 01.52 V Z31
2023-10-25 20:53:33 C 23 21 12.578 +71 36 14.60 V Z31
2023-10-25 21:13:58 C 23 16 38.847 +71 45 05.51 V Z31
2023-10-25 21:25:14 C 23 14 05.732 +71 49 48.33 V Z31
2023-10-25 21:40:06 C 23 10 41.207 +71 55 48.78 V Z31
2023-10-25 21:57:36 C 23 06 37.392 +72 02 35.66 V Z31