2021 UL4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2797365218 ± 2.27e-04
Semi-major axis (a)0.9565978792 AU ± 6.19e-06
Inclination (i)9.82887107° ± 1.03e-02
Long. of Asc. Node (Ω)227.57833941° ± 4.39e-03
Arg. of Perihelion (ω)11.59424931° ± 5.63e-03
Mean Anomaly (M)263.83584077° ± 3.68e-03
Mean Motion (n)1.0534602561°/day ± 1.02e-05
Perihelion dist (q)0.68900252 AU ± 2.17e-04
Aphelion dist (Q)1.22419324 AU ± 2.17e-04
Orbital Period0.93560842 yr ± 9.08e-06
Physical Parameters
H (abs. magnitude)24.19
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.191″
Uncertainty1
Orbit TypeAten
MOID0.129239 AU
Observations Used26
Oppositions1
Arc Total2021-2021
First Observation Used2021-10-28
Last Observation Used2021-11-10
Observations (26)
Date Type RA Dec Mag Band Observatory
2021-10-28 08:14:37 C 02 04 22.006 +26 21 39.75 U F52
2021-10-28 08:32:10 C 02 04 19.080 +26 20 50.34 U F52
2021-10-28 08:49:44 C 02 04 16.176 +26 20 01.57 U F52
2021-10-29 02:46:39 C 02 01 30.74 +25 29 13.4 V 033
2021-10-29 02:50:58 C 02 01 30.06 +25 29 01.0 V 033
2021-10-29 02:55:18 C 02 01 29.41 +25 28 48.8 V 033
2021-10-29 03:00:09 C 02 01 28.67 +25 28 35.2 V 033
2021-10-29 08:36:34 C 02 00 39.43 +25 13 12.9 V 291
2021-10-29 08:40:13 C 02 00 38.88 +25 13 02.7 V 291
2021-10-29 08:43:53 C 02 00 38.30 +25 12 52.6 V 291
2021-10-29 10:36:06 C 02 00 22.420 +25 07 49.59 V 568
2021-10-29 10:37:31 C 02 00 22.194 +25 07 45.65 V 568
2021-10-29 10:38:56 C 02 00 21.967 +25 07 41.67 V 568
2021-10-29 23:29:54 C 01 58 29.90 +24 31 28.3 V 033
2021-10-29 23:34:23 C 01 58 29.21 +24 31 16.0 V 033
2021-10-29 23:38:53 C 01 58 28.49 +24 31 02.9 V 033
2021-10-30 09:22:17 C 01 57 03.86 +24 04 11.1 V H01
2021-10-30 09:28:22 C 01 57 02.95 +24 03 54.0 V H01
2021-10-30 09:46:33 C 01 57 00.22 +24 03 02.7 V H01
2021-10-30 09:53:14 C 01 56 59.23 +24 02 43.9 V H01
2021-11-01 07:13:25 C 01 50 52.659 +21 58 35.23 U F52
2021-11-01 07:31:53 C 01 50 50.050 +21 57 45.91 U F52
2021-11-01 07:50:25 C 01 50 47.414 +21 56 56.51 U F52
2021-11-10 06:01:39 C 01 28 26.14 +13 12 17.5 o 291
2021-11-10 06:15:59 C 01 28 24.84 +13 11 47.0 o 291
2021-11-10 06:30:22 C 01 28 23.59 +13 11 16.5 o 291