2021 US1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1956090180 ± 4.78e-07
Semi-major axis (a)1.2229279420 AU ± 7.94e-07
Inclination (i)1.28139600° ± 3.43e-06
Long. of Asc. Node (Ω)220.80039042° ± 3.08e-05
Arg. of Perihelion (ω)203.29276926° ± 4.98e-05
Mean Anomaly (M)342.45814629° ± 1.02e-03
Mean Motion (n)0.7288043801°/day ± 7.10e-07
Perihelion dist (q)0.98371221 AU ± 8.66e-07
Aphelion dist (Q)1.46214368 AU ± 1.12e-06
Orbital Period1.35238798 yr ± 1.32e-06
Physical Parameters
H (abs. magnitude)27.70
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.267″
Uncertainty1
Orbit TypeApollo
MOID0.001617 AU
Observations Used179
Oppositions1
Arc Total2021-2022
First Observation Used2021-10-26
Last Observation Used2022-01-08
Observations (182)
Date Type RA Dec Mag Band Observatory
2021-11-04 04:48:03 C 05 11 26.35 +21 42 59.0 Z C95
2021-11-04 04:55:13 C 05 11 51.28 +21 41 49.0 Z C95
2021-11-04 05:02:18 C 05 12 15.94 +21 40 39.0 Z C95
2021-11-04 05:09:22 C 05 12 40.62 +21 39 28.4 Z C95
2021-11-04 05:16:28 C 05 13 05.49 +21 38 17.2 Z C95
2021-11-04 22:27:55 C 06 15 48.37 +18 32 16.2 V Z80
2021-11-04 22:34:36 C 06 16 09.25 +18 31 05.4 V Z80
2021-11-04 22:41:16 C 06 16 30.00 +18 29 54.8 V Z80
2021-11-05 01:30:44 C 06 24 54.15 +17 58 41.1 V J95
2021-11-05 01:35:16 C 06 25 07.05 +17 57 48.8 V J95
2021-11-05 01:40:55 C 06 25 23.10 +17 56 43.6 V J95
2021-11-05 01:45:24 C 06 25 35.77 +17 55 51.9 V J95
2021-11-05 23:37:05 C 07 24 09.51 +13 29 44.6 V 033
2021-11-05 23:37:30 C 07 24 10.38 +13 29 40.2 V 033
2021-11-05 23:37:54 C 07 24 11.24 +13 29 35.7 V 033
2021-11-05 23:38:19 C 07 24 12.11 +13 29 31.2 V 033
2021-11-05 23:38:43 C 07 24 12.97 +13 29 26.9 V 033
2021-11-07 02:16:55 C 08 12 16.69 +09 01 33.7 V 033
2021-11-07 02:17:25 C 08 12 17.34 +09 01 29.7 V 033
2021-11-07 02:17:55 C 08 12 17.97 +09 01 25.3 V 033
2021-11-07 15:28:33 C 08 29 20.705 +07 25 14.19 V T12
2021-11-07 15:29:20 C 08 29 21.418 +07 25 08.37 V T12
2021-11-07 15:30:08 C 08 29 22.126 +07 25 02.59 V T12
2021-11-10 12:18:43 C 09 22 45.37 +01 41 44.7 V G96
2021-11-10 12:33:37 C 09 22 50.30 +01 40 56.8 V G96
2021-11-10 12:41:05 C 09 22 52.73 +01 40 33.1 V G96
2021-11-10 12:47:56 C 09 22 54.98 +01 40 11.0 V G96
2021-11-10 12:48:32 C 09 22 55.15 +01 40 09.8 V G96
2021-11-10 12:49:08 C 09 22 55.37 +01 40 07.4 V G96
2022-01-07 09:40:45 C 10 36 08.312 -05 43 31.28 V G37
2022-01-07 09:46:53 C 10 36 07.941 -05 43 29.28 V G37
2022-01-08 15:13:46 C 10 34 52.679 -05 32 48.74 V T12