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
2021-10-28 18:03:56 C 00 05 38.10 +14 22 34.0 V 246
2021-10-28 18:04:15 C 00 05 38.25 +14 22 35.6 V 246
2021-10-28 18:04:33 C 00 05 38.39 +14 22 36.5 V 246
2021-10-28 18:04:52 C 00 05 38.56 +14 22 37.8 V 246
2021-10-28 18:05:10 C 00 05 38.58 +14 22 38.2 V 246
2021-10-28 20:44:42 C 00 06 50.95 +14 30 21.3 V 033
2021-10-28 20:45:09 C 00 06 51.14 +14 30 22.7 V 033
2021-10-28 20:45:35 C 00 06 51.34 +14 30 24.0 V 033
2021-10-28 20:46:16 C 00 06 51.66 +14 30 26.2 V 033
2021-10-28 20:46:46 C 00 06 51.87 +14 30 27.4 V 033
2021-10-29 01:56:26 C 00 10 30.46 +14 48 39.3 V 291
2021-10-29 01:58:41 C 00 10 31.59 +14 48 47.3 V 291
2021-10-29 01:59:26 C 00 10 31.94 +14 48 50.0 V 291
2021-10-29 17:12:24 C 00 20 56.33 +15 35 00.4 V 033
2021-10-29 17:12:49 C 00 20 56.59 +15 35 02.1 V 033
2021-10-29 17:13:13 C 00 20 56.88 +15 35 04.0 V 033
2021-10-29 17:13:43 C 00 20 57.21 +15 35 05.9 V 033
2021-10-30 04:19:18 C 00 29 43.41 +16 21 51.1 o 691
2021-10-30 04:29:15 C 00 29 49.96 +16 22 32.7 o 691
2021-10-30 04:39:10 C 00 29 56.54 +16 23 14.1 o 691
2021-10-30 08:52:53 C 00 33 28.98 +16 43 39.0 V T08
2021-10-30 08:58:20 C 00 33 32.67 +16 44 00.6 V T08
2021-10-30 09:34:33 C 00 33 57.62 +16 46 22.6 V T08
2021-10-30 09:42:17 C 00 34 03.00 +16 46 52.1 V T08
2021-10-30 20:40:33 C 00 45 55.36 +17 26 42.3 V Z80
2021-10-30 20:42:58 C 00 45 49.11 +17 27 13.4 V 033
2021-10-30 20:43:22 C 00 45 49.44 +17 27 15.0 V 033
2021-10-30 20:43:47 C 00 45 49.82 +17 27 16.6 V 033
2021-10-30 20:50:32 C 00 46 04.77 +17 27 31.3 V Z80
2021-10-30 21:00:34 C 00 46 14.21 +17 28 19.5 V Z80
2021-10-31 00:37:22 C 00 49 48.83 +17 51 20.9 V G40
2021-10-31 00:57:17 C 00 50 07.28 +17 52 48.1 V G40
2021-10-31 05:18:48 C 00 56 00.66 +18 13 22.9 o 691
2021-10-31 05:25:34 C 00 56 07.42 +18 13 57.4 o 691
2021-10-31 05:32:18 C 00 56 14.20 +18 14 31.3 o 691
2021-10-31 05:41:04 C 00 56 22.02 +18 15 06.8 V 703
2021-10-31 05:48:41 C 00 56 29.79 +18 15 44.7 V 703
2021-10-31 05:56:18 C 00 56 37.33 +18 16 22.7 V 703
2021-10-31 06:03:55 C 00 56 45.06 +18 16 59.9 V 703
2021-10-31 17:30:19 C 01 13 40.21 +19 08 37.5 V 033
2021-10-31 17:30:43 C 01 13 40.81 +19 08 40.2 V 033
2021-10-31 17:31:08 C 01 13 41.40 +19 08 42.8 V 033
2021-10-31 19:11:59 C 01 15 54.63 +19 20 15.1 V L18
2021-10-31 19:15:59 C 01 16 00.07 +19 20 38.4 V L18
2021-10-31 19:19:59 C 01 16 05.53 +19 21 01.2 V L18
2021-10-31 22:53:08 C 01 21 29.25 +19 39 57.3 V Z80
2021-10-31 23:01:15 C 01 21 41.01 +19 40 41.7 V Z80
2021-10-31 23:09:38 C 01 21 53.21 +19 41 27.0 V Z80
2021-10-31 23:13:10 C 01 21 59.33 +19 41 47.9 V J95
2021-10-31 23:16:23 C 01 22 04.01 +19 42 05.3 V J95