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
2021-10-31 23:18:43 C 01 22 07.44 +19 42 17.7 V J95
2021-10-31 23:20:57 C 01 22 10.70 +19 42 29.8 V J95
2021-11-01 10:07:23 C 01 41 54.18 +20 53 55.0 V T05
2021-11-01 10:12:00 C 01 42 01.80 +20 54 19.8 V T05
2021-11-01 10:20:34 C 01 42 15.91 +20 55 05.1 V T05
2021-11-01 10:34:49 C 01 42 39.66 +20 56 19.4 V T05
2021-11-01 18:37:09 C 02 01 20.63 +21 30 34.2 V L54
2021-11-01 18:45:25 C 02 01 38.12 +21 31 28.7 V L54
2021-11-01 18:53:19 C 02 01 54.80 +21 32 19.8 V L54
2021-11-01 19:42:29 C 02 03 38.39 +21 37 33.3 V L54
2021-11-01 19:55:32 C 02 04 05.78 +21 38 53.9 V L54
2021-11-01 20:08:14 C 02 04 32.25 +21 40 10.7 V L54
2021-11-01 21:00:39 C 02 06 17.25 +21 44 12.3 V L18
2021-11-01 21:01:53 C 02 06 19.89 +21 44 19.3 V L18
2021-11-01 21:03:08 C 02 06 22.55 +21 44 25.9 V L18
2021-11-01 21:29:16 C 02 07 46.69 +21 45 09.5 V Z80
2021-11-01 21:34:16 C 02 07 57.63 +21 45 39.5 V Z80
2021-11-01 21:39:17 C 02 08 08.64 +21 46 09.7 V Z80
2021-11-02 03:59:45 C 02 24 14.21 +22 25 23.2 Z W33
2021-11-02 04:09:57 C 02 24 37.88 +22 26 18.3 Z W33
2021-11-02 04:20:05 C 02 25 01.44 +22 27 11.9 Z W33
2021-11-02 22:32:32 C 03 20 51.71 +23 21 59.4 V Z80
2021-11-02 22:37:31 C 03 21 07.38 +23 22 11.2 V Z80
2021-11-02 22:42:32 C 03 21 23.02 +23 22 22.5 V Z80
2021-11-02 23:14:40 C 03 23 05.06 +23 23 29.7 V J95
2021-11-02 23:17:07 C 03 23 12.74 +23 23 34.5 V J95
2021-11-02 23:19:34 C 03 23 20.40 +23 23 39.2 V J95
2021-11-02 23:21:59 C 03 23 27.98 +23 23 43.8 V J95
2021-11-03 00:30:25 C 03 26 45.34 +23 25 33.0 V 033
2021-11-03 00:30:50 C 03 26 46.64 +23 25 33.2 V 033
2021-11-03 00:31:14 C 03 26 47.97 +23 25 33.4 V 033
2021-11-03 07:25:13 C 03 52 06.00 +23 33 56.7 V 703
2021-11-03 07:32:46 C 03 52 30.73 +23 33 52.3 V 703
2021-11-03 07:47:53 C 03 53 19.89 +23 33 41.4 V 703
2021-11-03 08:44:55 C 03 56 25.14 +23 32 28.1 V I52
2021-11-03 08:45:09 C 03 56 25.91 +23 32 27.7 V I52
2021-11-03 08:45:24 C 03 56 26.69 +23 32 27.2 V I52
2021-11-03 08:45:38 C 03 56 27.47 +23 32 26.8 V I52
2021-11-03 11:48:13 C 04 07 50.47 +23 32 42.0 V T08
2021-11-03 12:34:00 C 04 10 20.17 +23 30 20.4 V T08
2021-11-03 12:38:04 C 04 10 33.54 +23 30 06.0 V T08
2021-11-03 12:49:59 C 04 11 12.70 +23 29 22.6 V T08
2021-11-03 15:32:36 C 04 22 27.79 +23 12 21.8 q 900
2021-11-03 15:34:53 C 04 22 35.47 +23 12 13.7 q 900
2021-11-03 15:37:09 C 04 22 43.17 +23 12 05.9 q 900
2021-11-03 15:39:26 C 04 22 50.86 +23 11 58.2 q 900
2021-11-03 23:16:36 C 04 52 26.61 +22 21 45.9 V Z80
2021-11-03 23:21:36 C 04 52 44.44 +22 21 17.9 V Z80
2021-11-03 23:26:47 C 04 53 02.87 +22 20 48.7 V Z80
2021-11-04 04:40:53 C 05 11 01.43 +21 44 08.8 Z C95